My kids have been challenging each other with their math skills. DD7 (going into 2nd grade with math acceleration to 3rd) and ds5 (starting kinder math acceleration to 1st). She has been giving him adding with carrying and subtraction with borrowing (no clue when or where he learned this) and multiplication. He has been giving her 2 and 3 digit multiplication and asks "is this hard enough).

I think its too cute