Pack colors are pre-assorted and subject to change. Kidz - very soft - right hand - ages 7 thru 11. . A pint-sized version of the Original - with even softer bristles. The wide oval head thumb grip and large comfortable handle make this ideal for children and small adults. . With a 62 gram brushing weight (average children's toothbrush is 100) the mass of bristle tips (5000 - over 3 times more than regular) massages the gums and removes plaque effectively. . The large bristle area makes it easy for kids to hit the spot when brushing and lowers pressure on gum tissue. The extra bristles make it more durable and 60% of our users report it lasting three times longer than regular brushes. . We only make this model in right hand because unfortunately we cannot justify making a mold for the small number that lefties represent of children.