This one would be great for a group of school age children. Have them sit in a circle and one begins by tossing the ball to another kid. Whoever catches it answers the question closest to their right thumb. It's a great ice-breaker.
For everyone who hasn’t gotten their Hogwarts letter yet. Alice Mongkongllite / BuzzFeed Learn about chemical reactions with a lemon volcano. Not only is this experiment cool, it also smells good! Get the tutorial at Babble Dabble Do. babbledabbledo.