We had some of these plastic beads kicking around for years, but not very many, and mostly in grey and green. D found a nice batch of them in many colours at the thift store for just under $2. It took me a long time to organize them all by colour so that one can easily do projects, but I think it was time well-spent. The boys have made several little projects, and after I iron the beads, they stick together nicely. Perfect muddy/snowy day thing to do in the kitchen.