Apply Toothpaste Evenly: Squeeze a thin line or place small dots of toothpaste across both the top and bottom grooves of the U-shaped bristle head. Using a foaming or liquid gel toothpaste works best to fill the grooves.Bite and Position: Have your child gently slide the brush head into their mouth and bite down lightly so that the bristles wrap around both the upper and lower teeth.The "Wiggle" Motion: Do not keep the brush completely still. Instruct your child to move the handle continuously side-to-side (a left-right wiggle motion) or in small circular paths. This sweeping action is what moves the bristles against the tooth surfaces to sweep away food particles and build habits.