Ask the Wizard any yes or no question, touch anywhere on the question mark and receive a response! The most amazing part is trying to figure out how it works. There are no wires of any kind connecting the question mark to the small device which contains a speaker, and it only works when you use the tip of your finger! These Wizard-T- Shirts are 100% cotton, machine washable shirts are available in X-Large size only, but that is how every T-Shirt is now. To wash, simply remove the small sound box and toss it into the machine. Watch Batteries not included.