Firefly's Avengers Light and Sound toothbrush features soft, rounded, premium DuPont bristles so they are gentle on children's teeth while providing a thorough cleaning. This Firefly toothbrush comes in assorted Avengers characters, featuring either: Black Panther, Thor or Iron Man. The 1-minute light-up timer and sound effects help build healthy brushing habits and teach kids the dentist-recommended time for proper cleaning of each row of teeth. The ergonomic handle makes this light-up toothbrush fun and easy to use. Firefly makes healthy habits fun.