Instead of a large sensory table I've chosen to do small clear Rubbermaid containers that I lid and shelve and pull out as necessary. They have to climb up on a chair and use it one at a time; so that limits it to my older ones. I do have a few small bins for my babies that I give to them in their booster seats/trays. So, I was wondering how long my water bead once would keep/shelve for me. Thanks for the advice ladies