Fun Disco Brushing: Flashing Disco Lights Turn The Fight-To-Brush To A Want-To-Brush As Alternating Colors Light Up The Brush Head To Create An Entertaining And Fun Brushing Experience. Gentle & Effective Cleaning: The Age Appropriate Sonic Vibrations And Bpa Free Deepclean Flossing Bristles, Designed For Small Mouths, Clean Interdental And Gingival Regions Free Of Harmful Plaque With A 21% Increase In Reduction Over Manual Brushing. Form Good Habits: Award Winning Design Made For Small Hands, With Simple On/Off Button, Make It Easy For Your Little One To Brush On Their Own While The Smart 2 Min Disco Light Timer With 30 Sec Quadrant Change Pulses Teaches Your Child Good Brushing Habits. Grows With Your Child: From Toddler-Hood Through Preschool, Kidzsonics Affordable Bi-Level Deepclean Replaceable Brush Heads Come In 3-6 Yrs And 6+ Yrs Sizes. (1X 6+ Yrs Brush Heads & Aaa Battery Included) Durable: In Case Of Those Accidental Water Drops, The Ipx7 Waterproof Certified Design Allows Kidzsonic To Be Submerged In 3 Feet Of Water For Up To 20 Mins.