Here is a sleep tracker developed with children and toddlers in mind. The UrbanHello REMI offers 5 features to help your children stay sleep. It works as a night light, music player, Bluetooth speaker, and 2-way baby monitor. It monitors the sounds in the room and sends you a notification when noise is detected in the room.
REMI allows you to speak with your child through your smartphone. Costs under $100 at this time.