I was strolling the internet and found these great ideas:
I love these tie-dye hearts! How cute!
Check out how to do this at Mom to 2 Posh Lil Divas

Love, love, love these!  I think the kinders could make these if I gave them little heart stickers.
From: Color Me Katie

This a such a great math mat to make!
Instructions here:  Royal Math Mat