Glow sticks in the pool, great for night swimming! Not sure this would be the best idea for a big in ground pool (would probably take a couple hundred sticks), but would definitely be cool in a kid pool or an above ground pool!
Bucket list: give a shelter pet a loving home. I have already done this, but will continue to adopt shelter animals all my life. It makes me so sick and sad when animals get treated horribly. Save an animal, be their forever home.