So you want to stay in touch with your kids at all times? Pipsqueak might help. It is a Bluetooth and WiFi phone for kids that keeps parents in touch. Parents can control who their child connects with from the Yip Yap app.
Pipsqueak gives kids access to YouTube but also lets parents manage what is watched. The battery lasts up to 8 hours. The device has a color LCD display, built-in speakers, and a 5-way directional keypad for gaming. More info is available here.