In 2015, LEGO released 42 Duplo sets across 13 subthemes, all of these sets have been retired. Subthemes for that year included Batman, Building Sets, Cars, Disney Princess, Doc McStuffins, Fire, Forest Animals, Jake and the Never Land Pirates, My First, Sofia the First, SpiderMan, Trains, and Value Packs. For that year, the total price of all retail sets cost $1,160, today those sets are valued around $2,837, a growth of 145%.
Most valuable 2015 LEGO Duplo set
10599 Batman Adventure $187.73
Highest growth 2015 Duplo set
10600 Classic Race +598.36%
Largest 2015 LEGO Duplo set
10622 Large Creative Box 193 pieces
Most owned 2015 Duplo set
10597 Mickey & Minnie Birthday Parade
42 sets

10581 Ducks

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces / Duplo figures 13 / 1
Availability Retired
10581 LEGO Duplo Forest Animals Ducks
Retail $9.99
Value $36.23
Growth  +262.7%
Annual growth 10.4%

10582 Animals

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces / Duplo figures 39 / 2
Availability Retired
10582 LEGO Duplo Forest Animals Animals
Retail $19.99
Value $51.69
Growth  +158.6%
Annual growth 9.5%

10583 Fishing Trip

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces / Duplo figures 32 / 2
Availability Retired
10583 LEGO Duplo Forest Animals Fishing Trip
Retail $24.99
Value $54.45
Growth  +117.9%
Annual growth 5.8%

10584 Forest

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces / Duplo figures 105 / 3
Availability Retired
10584 LEGO Duplo Forest Animals Forest
Retail $59.99
Value $109.47
Growth  +82.5%
Annual growth 6.2%

10585 Mom and Baby

Theme Duplo
Year 2015
Pieces / Duplo figures 13 / 2
Availability Retired
10585 LEGO Duplo Mom and Baby
Retail $9.99
Value $26.25
Growth  +162.8%
Annual growth 7.1%

10586 Ice Cream Truck

Theme Duplo
Year 2015
Pieces / Duplo figures 11 / 2
Availability Retired
10586 LEGO Duplo Ice Cream Truck
Retail $14.99
Value $48.66
Growth  +224.6%
Annual growth 9.6%

10587 Café

Theme Duplo
Year 2015
Pieces / Duplo figures 52 / 3
Availability Retired
10587 LEGO Duplo Café
Retail $19.99
Value $24.98
Growth  +25.0%
Annual growth 3.8%

10589 Rally Car

Theme Duplo
Year 2015
Pieces / Duplo figures 13 / 1
Availability Retired
10589 LEGO Duplo Rally Car
Retail $14.99
Value $33.63
Growth  +124.3%
Annual growth 6.8%

10590 Airport

Theme Duplo
Year 2015
Pieces / Duplo figures 29 / 3
Availability Retired
10590 LEGO Duplo Airport
Retail $19.99
Value $125.25
Growth  +526.6%
Annual growth 12.3%

10591 Fire Boat

Theme / Subtheme Duplo / Fire
Year 2015
Pieces / Duplo figures 19 / 1
Availability Retired
10591 LEGO Duplo Fire Boat
Retail $14.99
Value $57.10
Growth  +280.9%
Annual growth 9.0%

10592 Fire Truck

Theme / Subtheme Duplo / Fire
Year 2015
Pieces / Duplo figures 26 / 1
Availability Retired
10592 LEGO Duplo Fire Truck
Retail $24.99
Value $34.95
Growth  +39.9%
Annual growth 6.1%

10593 Fire Station

Theme / Subtheme Duplo / Fire
Year 2015
Pieces / Duplo figures 105 / 2
Availability Retired
10593 LEGO Duplo Fire Station
Retail $49.99
Value $157.22
Growth  +214.5%
Annual growth 8.8%

10594 Sofia the First Royal Stable

Theme / Subtheme Duplo / Sofia the First
Year 2015
Pieces / Duplo figures 38 / 1
Availability Retired
10594 LEGO Duplo Sofia the First Royal Stable
Retail $24.99
Value $125.95
Growth  +404.0%
Annual growth 9.8%

10595 Sofia the First Royal Castle

Theme / Subtheme Duplo / Sofia the First
Year 2015
Pieces / Duplo figures 87 / 2
Availability Retired
10595 LEGO Duplo Sofia the First Royal Castle
Retail $49.99
Value $114.06
Growth  +128.2%
Annual growth 7.8%

10596 Disney Princess Collection

Theme / Subtheme Duplo / Disney Princess
Year 2015
Pieces / Duplo figures 63 / 3
Availability Retired
10596 LEGO Duplo Disney Princess Collection
Retail $39.99
Value $133.52
Growth  +233.9%
Annual growth 10.7%

10597 Mickey & Minnie Birthday Parade

Theme Duplo
Year 2015
Pieces / Duplo figures 24 / 2
Availability Retired
10597 LEGO Duplo Mickey & Minnie Birthday Parade
Retail $24.99
Value $27.64
Growth  +10.6%
Annual growth 1.6%

10599 Batman Adventure

Theme / Subtheme Duplo / Batman
Year 2015
Pieces / Duplo figures 47 / 1
Availability Retired
10599 LEGO Duplo Batman Adventure
Retail $39.99
Value $187.73
Growth  +369.4%
Annual growth 9.0%

10600 Classic Race

Theme / Subtheme Duplo / Cars
Year 2015
Pieces 29
Availability Retired
10600 LEGO Duplo Cars Classic Race
Retail $24.99
Value $174.52
Growth  +598.4%
Annual growth 10.9%

10601 Delivery Vehicle

Theme Duplo
Year 2015
Pieces / Duplo figures 19 / 1
Availability Retired
10601 LEGO Duplo Delivery Vehicle
Retail $19.99
Value $121.08
Growth  +505.7%
Annual growth 11.2%

10602 Camping

Theme Duplo
Year 2015
Pieces / Duplo figures 38 / 3
Availability Retired
10602 LEGO Duplo Camping
Retail $29.99
Value $47.81
Growth  +59.4%
Annual growth 5.0%

10603 My First Bus

Theme / Subtheme Duplo / My First
Year 2015
Pieces / Duplo figures 17 / 1
Availability Retired
10603 LEGO Duplo My First Bus
Retail $14.99
Value $28.92
Growth  +92.9%
Annual growth 7.5%

10604 Jake and the Never Land Pirates Treasure Island

Theme / Subtheme Duplo / Jake and the Never Land Pirates
Year 2015
Pieces / Duplo figures 25 / 2
Availability Retired
10604 LEGO Duplo Jake and the Never Land Pirates Treasure Island
Retail $19.99
Value $36.91
Growth  +84.6%
Annual growth 4.5%

10605 Doc McStuffins Rosie the Ambulance

Theme / Subtheme Duplo / Doc McStuffins
Year 2015
Pieces / Duplo figures 16 / 1
Availability Retired
10605 LEGO Duplo Doc McStuffins Rosie the Ambulance
Retail $19.99
Value $43.93
Growth  +119.8%
Annual growth 7.8%

10606 Doc McStuffins Backyard Clinic

Theme / Subtheme Duplo / Doc McStuffins
Year 2015
Pieces / Duplo figures 39 / 1
Availability Retired
10606 LEGO Duplo Doc McStuffins Backyard Clinic
Retail $29.99
Value $93.26
Growth  +211.0%
Annual growth 11.1%

10607 Spider-Man Web-Bike Workshop

Theme / Subtheme Duplo / Spider-Man
Year 2015
Pieces / Duplo figures 13 / 1
Availability Retired
10607 LEGO Duplo Spider-Man Web-Bike Workshop
Retail $14.99
Value $47.98
Growth  +220.1%
Annual growth 8.8%

10608 Spider-Man Spider Truck Adventure

Theme / Subtheme Duplo / Spider-Man
Year 2015
Pieces / Duplo figures 28 / 2
Availability Retired
10608 LEGO Duplo Spider-Man Spider Truck Adventure
Retail $29.99
Value $64.71
Growth  +115.8%
Annual growth 8.8%

10615 My First Tractor

Theme / Subtheme Duplo / My First
Year 2015
Pieces / Duplo figures 12 / 2
Availability Retired
10615 LEGO Duplo My First Tractor
Retail $14.99
Value $19.56
Growth  +30.5%
Annual growth 4.9%

10616 My First Playhouse

Theme / Subtheme Duplo / My First
Year 2015
Pieces / Duplo figures 25 / 2
Availability Retired
10616 LEGO Duplo My First Playhouse
Retail $19.99
Value $34.13
Growth  +70.7%
Annual growth 6.2%

10617 My First Farm

Theme / Subtheme Duplo / My First
Year 2015
Pieces / Duplo figures 26 / 2
Availability Retired
10617 LEGO Duplo My First Farm
Retail $19.99
Value $60.81
Growth  +204.2%
Annual growth 8.9%

10618 Creative Building Box

Theme / Subtheme Duplo / Building Sets
Year 2015
Pieces / Duplo figures 70 / 2
Availability Retired
10618 LEGO Duplo Creative Building Box
Retail $24.99
Value $108.13
Growth  +332.7%
Annual growth 9.7%

10622 Large Creative Box

Theme / Subtheme Duplo / Building Sets
Year 2015
Pieces / Duplo figures 193 / 2
Availability Retired
10622 LEGO Duplo Large Creative Box
Retail $59.99
Value $165.16
Growth  +175.3%
Annual growth 8.4%

10623 Large DUPLO Basic Bricks

Theme Duplo
Year 2015
Pieces 60
Availability Retired
10623 LEGO Large DUPLO Basic Bricks
Retail $39.99
Value $48.40
Growth  +21.0%
Annual growth 2.1%

30217-0 Forest Random Bag

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces 4
Availability Retired
30217-0 LEGO Duplo Forest Animals Forest Random Bag
promotional
Value $4.49
Annual growth 3.5%

30217 Random Bag

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces 4
Availability Retired
30217 LEGO Duplo Forest Animals Random Bag
promotional
Value $4.29
Annual growth 1.9%

30217-2 Squirrel

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces 4
Availability Retired
30217-2 LEGO Duplo Forest Animals Squirrel
promotional
Value $4.36
Annual growth 4.2%

30217-3 Rabbit

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces 4
Availability Retired
30217-3 LEGO Duplo Forest Animals Rabbit
promotional
Value $4.36
Annual growth 4.2%

30217-4 Deer

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces 4
Availability Retired
30217-4 LEGO Duplo Forest Animals Deer
promotional
Value $4.36
Annual growth 4.2%

30217-5 Bear

Theme / Subtheme Duplo / Forest Animals
Year 2015
Pieces 4
Availability Retired
30217-5 LEGO Duplo Forest Animals Bear
promotional
Value $4.36
Annual growth 4.2%

30218 Snail

Theme Duplo
Year 2015
Pieces 6
Availability Retired
30218 LEGO Duplo Snail
promotional
Value $4.95
Annual growth 8.0%

66494 Train 3-in-1 pack

Theme / Subtheme Duplo / Trains
Year 2015
Pieces 88
Availability Retired
66494 LEGO Duplo Train 3-in-1 pack
Retail $109.99
Value $131.15
Growth  +19.2%
Annual growth 3.1%

66524 Train Super Pack 3-in-1

Theme / Subtheme Duplo / Value Packs
Year 2015
Pieces 177
Availability Retired
66524 LEGO Duplo Train Super Pack 3-in-1
Retail $129.99
Value $173.98
Growth  +33.8%
Annual growth 3.0%

66525 Farm Super Pack 3-in-1

Theme / Subtheme Duplo / Value Packs
Year 2015
Pieces 142
Availability Retired
66525 LEGO Duplo Farm Super Pack 3-in-1
Retail $69.99
Value $56.52