Switching between child and parent account

Hello

I have my own iPhone on which I want to allow my child (appleID already generated and linked to Family) to play games, watch videos, ...

Is there an easy way to swap between accounts on my iPhone? There are much tutorials showing you how to set up a device just for your kid, but there is no instruction how to swap between accounts if you just want to hand your device to your child for some time.

Hope anyone can help me with this.

Thanks in advance!

Bruno