A rope bracelet - reminds me of making friendship bracelets back in the day. My right second toe used to go numb because I'd hook the end of the bracelet over it, and then knot embroidery floss for HOURS.
Bottle Catch Don't throw away those empty bleach bottles -- transform them into an outdoor catching game! Cut the end off a cleaned bleach bottle and remove the label. Wrap the bottle with colorful tape, and you're ready to play catch!