Gather them and give them to a scouting group ... they like recycling things and have many projects that can use them quite well. Another place to donate is your kindergarten classes ... used as building blocks isn't a far-fetched idea, and they will use them for a lot of small muscle coordination things that they call art! bag them up and take them to the thrift stores ... you never know who will purchase them, but I am betting they won't stay on the shelf for very long ....