In 2006, LEGO released 4 Education Duplo sets, all of these sets have been retired. For that year, the total price of all retail sets cost $266, today those sets are valued around $641, a growth of 141%.
Most valuable 2006 LEGO Education Duplo set
9212 Push Train Set $340.45
Most owned 2006 Education Duplo set
9224 Community People Set
4 sets

9211 Community Transport Set

Theme / Subtheme Education / Duplo
Year 2006
Pieces / Duplo figures 50 / 8
Availability Retired
9211 LEGO Education Duplo Community Transport Set
Retail $59.99
Value $61.89
Growth  +3.2%
Annual growth 3.0%

9212 Push Train Set

Theme / Subtheme Education / Duplo
Year 2006
Pieces / Duplo figures 129 / 3
Availability Retired
9212 LEGO Education Duplo Push Train Set
Retail $89.99
Value $340.45
Growth  +278.3%
Annual growth 5.4%

9224 Community People Set

Theme / Subtheme Education / Duplo
Year 2006
Pieces / Duplo figures 20 / 20
Availability Retired
9224 LEGO Education Duplo Community People Set
Retail $35.99
Value $90.00
Growth  +150.1%
Annual growth 2.6%

9240 Fire Rescue Services Set

Theme / Subtheme Education / Duplo
Year 2006
Pieces / Duplo figures 129 / 4
Availability Retired
9240 LEGO Education Duplo Fire Rescue Services Set
Retail $79.99
Value $148.26
Growth  +85.3%
Annual growth 3.3%