Children often have problems gripping the handles of regular toothbrushes, but they won't have any problems holding on to the Radius Kidz brush. Its asymmetrical design automatically puts the bristle at 45 degrees to the gumline, as recommended by dentists. The wide and large bristle tip softens the pressure of daily brushing, which lessens the chance of gum erosion. Radius Kidz toothbrushes use softer bristles, but more bristle tips to make brushing more comfortable.