pack of 4 superior cleaning to fight cavities Oral-B PRO Kids 3+ Spiderman Brush Heads for Electric Toothbrush Pack of 4. The Oral-B Kids 3+ toothbrush head gives kids the fun of Spiderman with the gentle, effective clean of a dentists-recommended Oral-B toothbrush. The extra soft bristles and small round head are specifically designed for kids and they are compatible with all the Oral-B Kids electric toothbrushes