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.

Elmer Maths - Addition & Subtraction: Simple addition and subtraction sums practising number bonds to then use the key to find the right color for the answer.