Building

http://www.brickbuildinggame.com/
Lego-Like

http://www.playabit.com/games/hello-kitty-fan-room.html
Hello Kitty Fan Room
http://www.pbs.org/parents/education/math/games/preschool-kindergarten/building-sandcastles/
sandcastles
http://www.bobthebuilder.com/usa/games_design_a_house.asp
design a house
http://www.sproutonline.com/games/building-caillou
Dollhouse
http://www.abcya.com/build_a_house.htm
House