prince & co.: The Trading Game: Money Style.Race to a Quarter. This game is VERY simple but powerful for the kids because it helps them to make those connections that 5 pennies = 1 nickel, 2 nickels = 1 dime, etc.
Number magnets to keep track of kids you allow to leave the room. Use a cookie sheet with glass stones glued to scrapbook paper and a magnet. then trim in fun duct tape! (The cookie sheet magnet board is pretty sweet for multiple different crafts.
Simple solution to all your dice problems! Stick two dice in a small tupperware container. Have the children shake the container and look at the dice. No "throwing" dice or losing them either. I will probably use foam dice as they are noiseless.