I feel a little silly even posting this but I'm at a loss. All the kid size toothbrushes I see have at least some part that's rubbery or softer plastic. And my 1 year old bites HARD! He keeps munching pieces off every toothbrush I buy! Doesn't anyone anymore sell plain solid plastic toothbrushes or do I just need to get really strict and not let my very independent minded toddler handle his own toothbrush ever?