In 2006, LEGO released 5 Promotional sets across 3 subthemes, all of these sets have been retired. Subthemes for that year included LEGO Brand Stores, LEGO Japan Magazine, and LEGOLAND.
Most valuable 2006 LEGO Promotional set
Pirate Treasure Chest Coin Bank $499.18
5 sets

Boford P. Alligator

Theme / Subtheme Promotional / LEGO Brand Stores
Year 2006
Pieces 148
Availability Retired
Boford P. Alligator
promotional
Value $173.18
Annual growth 13.6%

Pirate Treasure Chest Coin Bank

Theme / Subtheme Promotional / LEGOLAND
Year 2006
Pieces / Minifigs 215 / 1
Availability Retired
LEGOLAND Pirate Treasure Chest Coin Bank
promotional
Value $499.18
Annual growth 7.9%

Pirate Ship

Theme / Subtheme Promotional / LEGOLAND
Year 2006
Pieces 127
Availability Retired
LEGOLAND Pirate Ship
promotional
Value $10.56
Annual growth 7.2%

Ostrich Yellow Label

Theme / Subtheme Promotional / LEGO Japan Magazine
Year 2006
Pieces 10
Availability Retired
LEGO Japan Magazine Ostrich Yellow Label
promotional
Value $38.36
Annual growth 7.6%

Blue Label Dog

Theme / Subtheme Promotional / LEGO Japan Magazine
Year 2006
Pieces 13
Availability Retired
LEGO Japan Magazine Blue Label Dog
promotional
Value $11.37
Annual growth 5.4%