In 2003, LEGO released 1 Duplo sets, all of these sets have been retired.
1 set

1166 Stack-n-Learn

Theme Duplo
Year 2003
Pieces / Duplo figures 42 / 2
Availability Retired
1166 LEGO Duplo Stack-n-Learn
Retail $19.99
Value $198.32
Growth  +892.1%
Annual growth 7.6%