We have tested the best electric toothbrushes for kids: From toddler-friendly products to fun-filled gadgets for pre-teens, these are the best toothbrushes to buy little ones this Christmas.

Xiaomi has introduced the new Mijia Sonic Vibration Electric Toothbrush Pro in China. Priced at 249 yuan ($34), it is available at an introductory offer of 199 yuan ($27) and will officially go on ...