This costume is great for a funny nerd costume. The felt cap has a black trim, spinning plastic propeller, and an adjustable black chin strap. The plastic motorized propeller really works and spins with the flip off the on/off switch. **Batteries are NOT included!! Also included is a functioning train whistle. No more running in the halls! This train conductor's whistle has a ring hook attached to a lanyard so you can carry it with you around your neck. Lanyard included, train whistle measures: 2.5 inches long. Recommended for ages 3 and up. Perfect for a hall monitor costume.