Yarkade is strict by default. Link your kid's device to see their play time and set limits, bedtime and what's switched on. Kids never type personal info: they pick a nickname from word lists.
On your kid's device, open Yarkade, find My Yarkade and tap "Ask a parent to link". Type the 6-letter code here.
Every device starts with these. You can raise them up to the most a parent can set.
Learning games don't use play time. Every 10 minutes of learning adds 5 minutes of play, up to 15 extra minutes a day. Bedtime is 8:30 pm to 7 am on the device's clock unless you change it.