*This is what my 5 and 3 year old use*. I recommend a child transition to an electric brush around age 3, when he can tolerate the vibrations and no longer bites down on the brush head. That said – it’s all about technique. If a child brushes well with a manual brush and is happier with one, stick with what works. Check-in frequently with disclosing tablets to be sure that a child is brushing thoroughly when brushing solo (not until age 7ish when he can tie his shoes independently, until then – supervision is recommended because their dexterity is insufficient).