Invention Box! Collect broken toy, appliance pieces, and other tech treasures in a box for young inventor tinkering. This encourages creativity, critical thinking, and resourcefulness. (Via pink and green mama)
An activity board I just made for my tots. Went to the hardware store for knobs, locks, lights, etc. and screwed them into an old kitchen cabinet door. Everything they ever wanted to play with (but was off limits), nailed to a board.