Unifix cubes are a concrete representation of addition/number bonds. Building the bond with the Unifix cubes is what develops number sense. Great use for flash cards instead of looking for just memorization

These worksheets will help students with basic addition and subtraction facts, counting on, fact families, subitizing, and automaticity with math facts. Part-part-whole

I could totally do this with money-- dollars on a pumpkin then popsicle sticks with bills and coins that add up to the amount. Addition/subtraction sorting - child needs to determine which sticks add up to the number on the bucket.

Play Create Explore: Fun Learning Activities with Laminated Alphabet Letters.I really like the bean bag game- C may not notice she's learning if its a fun game