To see what your child's been buying in the Microsoft Store on Windows 10 and Xbox One devices:
- Go to your family group and sign in with your Microsoft account.
- Find the name of the child whose purchases you’d like to see.
- Select More options > Spending, then, for recent purchases, scroll down to Purchase history.
- To see more than 90 days of purchase history, ask your child to sign in to your family group. Go to Payment & billing and select Order history.