cool idea for math. If kids are having problems with math this would be a great way to help them learn math fractions. I dont' have Lego's but I do have unifix cubes.

Hands-On Pumpkin Math with The Geo Pumpkin - A fall twist to the classic geoboard. Hours and hours of fun for preschoolers. Wonderful way to practice fine and gross motor skills, explore math concepts, and just have fun!

LEGO Fractions Activities, hands on math ideas for kindergarten, preschool, grade, homeschool