Counting By tens

My four year old son loves his numbers, so I wanted him to really begin learning how to count by two's, five's, and ten's in a fun way, so we jump around and count 10-20-30-40-50... my three and four year old love counting this way. Then we do jumping jacks and count the same way till we get to 100 and then we all fall down. Its so simple and gets everyone moving and bruning some energy what with all the snow outside. My three year old has been really, really into coloring so we color on the windows and the tubs (test a small surface first) since washable markers are pretty easy to take off of everything with just a sponge. Since they are in to playing post office, I gave them tons of envelopes and stickers to write letters to people and then we use shopping totes for mail bags and resend them and mail them all over the house :)