CENTERS: If my listening center table on donors choose doesn't get funded I think I'll go to IKEA and make this instead. But I think I'd choose a Lak coffe table instead of the side tables so more kids could fit
They sell these tins at craft stores in the wedding section (use a coupon to get a good deal) attach strong magnets. I got a metal board from Ikea and they just magnet on there. You could also paint a cookie sheet any color you like and use that.