Teeth should always be brushed under the supervision of an adult. Apply a pea-sized amount of kids toothpaste on the white bristles. Brush teeth about 30 minutes after a meal for 2-3 minutes twice daily. Brush from back to front, first the outer surfaces and then the inner surfaces of the teeth before brushing the chewing surfaces. Brush every single tooth thoroughly. Replace toothbrush every 2-3 months.