Preschool Center: Clothespin cards for counting. Could easily be adapted to word work, alphabet recognition, etc.
FiddleStix - Here's a new way for kids to sort addition or subtraction facts! Free idea from The Stay-at-Home-Mom Survival Guide. ...instead of Popsicle sticks, use gemstones with answers written on them...have a different set of stones and egg cartons for each times table