Looks like LEGOS are the manipulative that everyone needs this year! Check out these LEGO ideas. LEGO Letters Have students use re.

More Lego Math - Subtraction! (I dunno if Kindergarten teachers teach subtraction , but this is a cute idea.

What a great way to learn math! What kid doesn't love Legos? Again I would laminate these to be reusable, provide Legos to use as math manipulatives. Students could solve the problems and then self check using the Legos.

Know any Lego fans? Fun ideas here for lego math games