A very interesting tic-tac-toe board, and the outline is usually a sticker, so you can shred that up into cool shaped stickers
pee (many forum topics about this, unfortunately)
The cache is very visible so I can use the pee to fertilize the plants around it so they can grow faster to hide the cache. ( Yes, urine can indeed be used as a fertilizer. Just google "urine fertilzer" )
What to do with this bouncy ball with a chunk taking out if it?