If you’re worried that your kids are basically swallowing their food whole, with this gadget you can confirm your suspicions. Just attach it to their jaw and it will let you know how how much your child chews their food. It even encourages them by making sounds after every 30 and 1,000 bites. They offer a version for elementary school kids as well as one for middle school kids. I’m sure this would go over great with a preteen/teen. Luckily this product is being sold in Japan, not the US or UK. In Japan though, both versions of the sensor will cost you $110.