I had "sorting bags" in my classroom when I used to teach grade 1. Another teacher passed them on to me and they have been sitting in my shed for 8 years. I finally dug them out and gave them to the kids. It was the quietest I have seem them in days as they worked together to sort out the items.
That is a LOT of extra junk to have in the house - right when I am trying to get rid of stuff like that! But I will hang onto the stuff for awhile yet. We have some other activities in mind. Stay tuned!