My 21-month old HATES having his teeth brushed. He'll sometimes take the toothbrush and chew it for a bit quite happily but as soon as I take over to properly brush his teeth he struggles and cries and I have to pin him down to finish which is horrible for us both! Any tips for his age would be so appreciated. We've tried singing songs and brushing our teeth at the same time to show him what to do and jolly him along, but it doesn't seem to help.