My husband always saves our tin cans for various painting projects, etc. He had a bunch of them stacked up on his workbench in the garage. My girls noticed them and asked if they could use them. They now have a spot in our playroom. A lot of people asked about sharp edges. We have a manual opener and never have any problems with the rim being sharp. If you are worried i’m sure you could put a piece of duck tape around the edge. We have various sizes from coffee, tuna fish, tomato paste, beans, etc.
My girls used them here to make a natural playground with their tree blocks.
Tin can turned hot tub.
Great for building and making towers to knock down!