Marble Races with a cheap pool noodle (occupies the kids for hours.) Did this, but instead of cutting the pool noodle, the marble is small enough to fit inside the full noodle to roll down. Then can use the noodle for other things too!
Mason jar with inverted cupcake liner as lid - punch a straw thru to drink - Keeps bugs out of your drinks, prevents spills & can match to any color/holiday/theme. Is there any situation where a mason jar ISN'T helpful?