If you are looking for a high tech way to signal your child for when its time to do chores, take a peek at the Garamin Vivofit JR 2. This swim friendly watch has a 1-year battery life and needs no recharging. The free parent mobile app has fun / educational mobile adventures for kids, plus chore/behavior management for parents. Parent s can even set up rewards for chore completion. This is OS compatible with Android 4.4 and above with Bluetooth 4.0 or greater, or iPhone OS version 9.1 and above. A direct product link is posted on otkidsmass.com. Look under 'must have products' in the activities of daily living section.