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31378 LEGO Creator Space Exploration Telescope thumbnail image

31378 LEGO Creator Space Exploration Telescope
Images 6Description 
31378 LEGO Creator Space Exploration Telescope
  • Space Exploration Telescope thumbnail
  • Space Exploration Telescope thumbnail
  • Space Exploration Telescope thumbnail
  • Space Exploration Telescope thumbnail
  • Space Exploration Telescope thumbnail
  • Space Exploration Telescope thumbnail

LEGO 31378 Space Exploration Telescope is a Creator set currently available at retail for $34.99 and is projected to retire in mid and late 2027. Current new-sealed secondary market prices range from $40 to $55.

Forecast Model

This represents the expected annual growth (CAGR) based solely on a forecast model.
LEGO 31378 Space Exploration Telescope is a Creator 3-in-1 set released in 2026, containing 278 pieces. It builds an adjustable telescope on a tripod with a spinning solar system model, and can also be rebuilt into an adjustable microscope or a UFO with posable antennae and legs. The set includes a light brick and three interchangeable decorated projection lenses showing a planet, a star, and the Moon. The solar system model features the sun and seven planets that can be rotated around.

Once retired, the expected annual growth will be close to 3% after the second year, valuing the set between $40 and $41 shortly after it is retired.
All regions

For Sale (New/Sealed)

This chart shows the sales listing trends of 31378 Space Exploration Telescope.
 (KR) Creator 3in1 31378 Space Exploration Telescope Set $30.15
-13.8%
(US) Official LEGO Space Exploration Telescope
BrickEconomy Choice
$34.99
(BE) No additional fees Nicely wrapped in bubble plastic to avoid possible shelf wear.VAT... $37.70
+7.7%
(AT) + 3.5% paypal fees | if you need higher qtys please get in touch with us $37.73
+7.8%
(US) LEGO Creator 3 in 1 Space Exploration Telescope (31378) $38.69
+10.6%
(US) BrickLink store BricqLedger $38.99
+11.4%
(US) 31378 Space Exploration Telescope Creator 3 in 1 - New in Box $40.25
+15.0%
(US) 31378 Creator 3-in-1 Space Exploration Telescope (microscope, spaceship) $42.40
+21.2%
(US) Creator Space Exploration Telescope 31378 new sealed $45.00
+28.6%
(US) 31378 Creator 3-in-1 Space Exploration Telescope (microscope, spaceship) $45.00
+28.6%
(US) BrickLink store BuildingCelebration $46.05
+31.6%
(KR) [Sealed] Lego 31378 Creator 3-in-1 Space Exploration Telescope $47.00
+34.3%
(US) BrickLink store Balanced Life Brick Store $47.00
+34.3%
(US) Creator: 3-in-1 Space Exploration Telescope (31378) SEALED $49.95
+42.8%
Show 6 more listings

Sets in Creator

31388 Wild Animals Family of Koalas

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 1,536
Availability Retail
31388 LEGO Creator 3 in 1 Wild Animals Family of Koalas
Retail $129.99
Available at retail

31387 Iconic Pirate Ship

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces / Minifigs 1,074 / 4
Availability Retail
31387 LEGO Creator 3 in 1 Iconic Pirate Ship
Retail $109.99
Available at retail

31389 Iconic Ferris Wheel

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces / Minifigs 916 / 2
Availability Pending release
31389 LEGO Creator 3 in 1 Iconic Ferris Wheel
Retail $99.99
Not yet released
Available August

31386 Wild Animals Majestic Lion

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 839
Availability Retail
31386 LEGO Creator 3 in 1 Wild Animals Majestic Lion
Retail $69.99
Available at retail

31393 Forest Animals Gray Wolf

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 657
Availability Retail
31393 LEGO Creator 3 in 1 Forest Animals Gray Wolf
Retail $49.99
Available at retail

31385 Sea Animals Beautiful Dolphins

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 542
Availability Retail
31385 LEGO Creator 3 in 1 Sea Animals Beautiful Dolphins
Retail $49.99
Available at retail

31392 Music Decor Piano

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 485
Availability Pending release
31392 LEGO Creator 3 in 1 Music Decor Piano
Retail $49.99
Not yet released
Available August

31381 Fierce Shark with a Treasure Chest

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 379
Availability Retail
31381 LEGO Creator 3 in 1 Fierce Shark with a Treasure Chest
Retail $34.99
Available at retail

31390 Floral Art Painting

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 348
Availability Retail
31390 LEGO Creator 3 in 1 Floral Art Painting
Retail $29.99
Available at retail

31382 Cute Animals Playful Puppy Dog

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 336
Availability Retail
31382 LEGO Creator 3 in 1 Cute Animals Playful Puppy Dog
Retail $29.99
Available at retail

31384 Wild Animals Colorful Hummingbird

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 312
Availability Retail
31384 LEGO Creator 3 in 1 Wild Animals Colorful Hummingbird
Retail $29.99
Available at retail

31394 Red Panda

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 297
Availability Pending release
31394 LEGO Creator 3 in 1 Red Panda
Retail $29.99
Not yet released
Available August

31383 Floral Decor Perfume Bottle

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 286
Availability Retail
31383 LEGO Creator 3 in 1 Floral Decor Perfume Bottle
Retail $29.99
Available at retail

31379 Fierce Dinosaur

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 283
Availability Retail
31379 LEGO Creator 3 in 1 Fierce Dinosaur
Retail $19.99
Available at retail

31391 Fashion Bag with Storage

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 272
Availability Retail
31391 LEGO Creator 3 in 1 Fashion Bag with Storage
Retail $29.99
Available at retail

31380 Retro Gaming Console

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 268
Availability Retail
31380 LEGO Creator 3 in 1 Retro Gaming Console
Retail $19.99
Available at retail

40885 Duck Family

Theme / Subtheme Creator / Promotional
Year 2026
Pieces 262
Availability Retired
40885 LEGO Creator Duck Family
promotional

40953 London Bus

Theme / Subtheme Creator / Miscellaneous
Year 2026
Pieces 245
Availability Retail
40953 LEGO Creator London Bus
Retail $19.99
Available at retail

40954 Germany Postcard

Theme / Subtheme Creator / Postcard
Year 2026
Pieces 240
Availability Retail
40954 LEGO Creator Germany Postcard
Retail $14.99
Available at retail

31376 Cute Hamster with a Flower

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 166
Availability Retail
31376 LEGO Creator 3 in 1 Cute Hamster with a Flower
Retail $9.99
Available at retail

31377 Turtle with a Water Lily Flower

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 124
Availability Retail
31377 LEGO Creator 3 in 1 Turtle with a Water Lily Flower
Retail $9.99
Available at retail

30714 Orange Cat

Theme / Subtheme Creator / 3 in 1
Year 2026
Pieces 79
Availability Retired
30714 LEGO Creator 3 in 1 Orange Cat
Retail $4.99
Value $8.42
Growth  +68.7%
Annual growth 30.3%

30717 Fun Halloween Skeleton

Theme / Subtheme Creator / Seasonal
Year 2026
Pieces 71
Availability Retail
30717 LEGO Creator Fun Halloween Skeleton
Retail $4.99
Available at retail

30718 Cataclaws Snow Adventure

Theme / Subtheme Creator / Seasonal
Year 2026
Pieces 70
Availability Retail
30718 LEGO Creator Cataclaws Snow Adventure
Retail $3.99
Available at retail

30716 Cute Easter Bunny

Theme / Subtheme Creator / Seasonal
Year 2026
Pieces 66
Availability Retired
30716 LEGO Creator Cute Easter Bunny
Retail $4.99
Value $8.99
Growth  +80.2%

My Collection

Space Exploration Telescope Reviews

16 reviews
4.7
Collectors
Investors
Brick Fanatics
“The icing on the 31378 Space Exploration Telescope cake is the smart inclusion of a light brick, with the interactive element allowing for images to be projected, objects to be illuminated or a bright beam to burst forth from the alien ship. A STEM toy aimed at kids that... More will also appeal to many older builders, this LEGO Creator 3-in-1 set shows just how strong and creative the long-running theme remains.”
Full review at www.brickfanatics.com
BrickEconomy Expert Review
“This Creator 3-in-1 space-themed build offers a clean, approachable construction that effectively demonstrates how a single parts selection can support three structurally distinct models. The telescope build stands out for its integrated light element and interchangeable lenses, while the alternate microscope and UFO designs reuse components in clearly intentional ways that highlight modular design and functional rebuilding. Although the forms favor simplicity over technical realism, the set succeeds as a well-balanced educational build with... More strong versatility and parts utility.”
 

About Creator

The LEGO Creator theme consists of a variety of subthemes that revolve around sets that focus on buildings, creatures, vehicles, robots and recently more specialized sets such as botanical and even the Chinese New Year. Many of these sets have fallen under the 3-in-1 label which include instructions in a single set to provide multiple alternative models. Originally created in 2001 with a focus on larger bucket sets, the LEGO Creator theme has expanded outside just bricks to later include minifigures.
Read more
Boys and girls ages 8 and up can indulge their passion for science and space with this LEGO Creator 3 in 1 Space Exploration Telescope (31378) building set. This detailed STEM toy offers 3 different building options with the same set of bricks.

Kids can choose to build an adjustable telescope toy on a tripod with a solar system model featuring the sun and 7 planets that can be spun around. This can be rebuilt into an adjustable microscope toy or a UFO model with posable antennae and legs thatflip out to display it.

Each space toy includes a light brick (batteries included), which kids can activate by pushing a button to project images from the telescope onto a surface, illuminate images on the microscope or beam a light from underneaththe UFO. There are 3 interchangeable decorated lenses, with images of a planet, a star and the Moon to project from the telescope or view inside the microscope. Please note models cannot be built simultaneously. Set contains 278 pieces.

3 IN...
Description provided by LEGO©