LEGO CREATOR: HARRY POTTER
Lego Media $29.99
You'll need to read the manual, but it's a real kick to build Potter settings and then cast spells.
SCAN COMMAND: JURASSIC PARK
Knowledge Adventure $39.99
Power up an army of dinosaurs. Complicated, but great graphics.
THE OREGON TRAIL, 5TH EDITION
Learning Co. $24.95
It'll require a lot of planning to lead your wagon party.
3D SNOWBOARD RESORT DESIGNER
Pantera Entertainment $19.99
Build your own snowboard course--complete with jumps and moguls--and ride it.
Disney Imagineering $39.99
Create a roller coaster, and let it rip.
Design a zoo, and keep the animals fed and happy.