In 1984, LEGO released 17 Duplo sets across 3 subthemes, all of these sets have been retired. Subthemes for that year included Baby, Supplementary, and Trains.
Most valuable 1984 LEGO Duplo set
2345 Basic Set House $119.67
Highest growth 1984 Duplo set
2649 Sea Explorer +371.15%
Largest 1984 LEGO Duplo set
2375 Basic Set Town 53 pieces
Most owned 1984 Duplo set
2717 Train Bridge
Theme Duplo
Year 1984
Pieces 6
Availability Retired
1900 LEGO Duplo Special Trial Pack Duck
Theme / Subtheme Duplo / Baby
Year 1984
Pieces 2
Availability Retired
2054 LEGO Duplo Baby Squirrel Rattle
Value $52.69
Theme / Subtheme Duplo / Baby
Year 1984
Pieces / Duplo figures 2 / 1
Availability Retired
2055 LEGO Duplo Baby Rocking Horse
Retail $15.50
Value $43.50
Growth  +180.6%
Annual growth 2.9%
Theme Duplo
Year 1984
Pieces 1
Availability Retired
2305 LEGO Duplo Red Base Plate
Retail $9.99
Value $32.40
Growth  +224.3%
Annual growth 7.2%
Theme / Subtheme Duplo / Supplementary
Year 1984
Pieces 18
Availability Retired
2307 LEGO Duplo Supplementary Set
Retail $9.99
Value $15.65
Growth  +56.7%
Annual growth 1.1%
Theme / Subtheme Duplo / Supplementary
Year 1984
Pieces 25
Availability Retired
2309 LEGO Duplo Supplementary Set
Retail $12.99
Value $31.00
Growth  +138.6%
Annual growth 2.2%
Theme Duplo
Year 1984
Pieces 9
Availability Retired
2335 LEGO Duplo Basic Set Animal
Value $12.44
Theme Duplo
Year 1984
Pieces / Duplo figures 15 / 2
Availability Retired
2345 LEGO Duplo Basic Set House
Value $119.67
Theme Duplo
Year 1984
Pieces / Duplo figures 25 / 2
Availability Retired
2355 LEGO Duplo Basic Set Vehicles
Value $96.83
Theme Duplo
Year 1984
Pieces / Duplo figures 53 / 4
Availability Retired
2375 LEGO Duplo Basic Set Town
Theme Duplo
Year 1984
Pieces / Duplo figures 2 / 1
Availability Retired
2618 LEGO Duplo Deep Sea Diver
Value $37.81
Theme Duplo
Year 1984
Pieces / Duplo figures 2 / 1
Availability Retired
2619 LEGO Duplo Helicopter
Retail $9.99
Value $25.04
Growth  +150.7%
Annual growth 2.3%
Theme Duplo
Year 1984
Pieces / Duplo figures 3 / 1
Availability Retired
2636 LEGO Duplo Tow Truck
Theme Duplo
Year 1984
Pieces / Duplo figures 12 / 2
Availability Retired
2639 LEGO Duplo Petrol Station
Value $88.87
Theme Duplo
Year 1984
Pieces / Duplo figures 36 / 3
Availability Retired
2649 LEGO Duplo Sea Explorer
Retail $24.99
Value $117.74
Growth  +371.1%
Annual growth 4.0%
Theme / Subtheme Duplo / Trains
Year 1984
Pieces 10
Availability Retired
2713 LEGO Duplo Train Points
Retail $11.99
Value $29.90
Growth  +149.4%
Annual growth 2.3%
Theme / Subtheme Duplo / Trains
Year 1984
Pieces 5
Availability Retired
2717 LEGO Duplo Train Bridge
Retail $8.99
Value $35.41
Growth  +293.9%
Annual growth 4.0%