In 1996, LEGO released 7 Duplo Building Sets sets, all of these sets have been retired. For that year, the total price of all retail sets cost $68, today those sets are valued around $313, a growth of 360%.
Most valuable 1996 LEGO Duplo Building Sets set
1751 Small Bulk Bucket $94.67
Largest 1996 LEGO Duplo Building Sets set
1797 Bonus Bucket 90 pieces
7 sets

1751 Small Bulk Bucket

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces / Duplo figures 27 / 1
Availability Retired
1751 LEGO Duplo Small Bulk Bucket
Retail $5.99
Value $94.67
Growth  +1480.5%
Annual growth 9.6%

1753 Medium Bulk Bucket

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces / Duplo figures 47 / 1
Availability Retired
1753 LEGO Duplo Medium Bulk Bucket
Retail $9.99
Value $83.77
Growth  +738.5%
Annual growth 7.4%

1784 Animals Bulk Box

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 21
Availability Retired
1784 LEGO Duplo Animals Bulk Box
Retail $4.99
Value $24.14
Growth  +383.8%
Annual growth 5.4%

1797 Bonus Bucket

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 90
Availability Retired
1797 LEGO Duplo Bonus Bucket
Retail $19.99
Value $31.95
Growth  +59.8%
Annual growth 1.6%

1861 Box of Bricks

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 49
Availability Retired
1861 LEGO Duplo Box of Bricks
Retail $8.99
Value $40.05
Growth  +345.5%
Annual growth 5.1%

2321 Happy Birthday Building Set

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces / Duplo figures 32 / 1
Availability Retired
2321 LEGO Duplo Happy Birthday Building Set
Retail $7.99
Value $23.28
Growth  +191.4%
Annual growth 4.8%

2339 Basic Box

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 49
Availability Retired
2339 LEGO Duplo Basic Box
Retail $9.99
Value $14.64
Growth  +46.5%
Annual growth 1.3%