Dollar store photo albums... Turn them into flashcard fun! Easy to write and wipe, just insert what you are working on. You could even just insert white paper and have them work on writing sight words, so many ways to use them!
Math tub idea: Get two ice trays from the dollar spot at Target, write 2-digit numbers on white labels for each hole, and kids toss a cube in each tray and add numbers together on recording sheet or whiteboard. They think it's so fun!!