“Our iPad”?
Outside of Educational establishments, an iPad is principally a single user device. As such, it is intended to be used by one person only; there is no concept of a “child” profile - or the ability to create multiple accounts for different users with differing levels of access.
As such, if your intent is to share an iPad with a child, you’re going to have all kinds of difficulties with privacy and restricting access to Apps or your own personal/sensitive data - notwithstanding potential device and AppleID account lockout issues.
Each user should have their own device(s) that are used with their own AppleID. Devices intended for use by children can be configured with Screen Time Restrictions and Parental Controls - in addition to Family Sharing which allows you to selectively share paid Apple Services and Media content.
A child’s device will be configured with a unique AppleID that is used by the child on their own device(s). For “minors” (i.e., under 13) the AppleID is restricted in its capabilities.
Screen Time
Use Screen Time on your iPhone, iPad or iPod touch – Apple Support
Set up Screen Time for a family member on iPad - Apple Support
Family Sharing
Family Sharing - Apple
Set up Family Sharing – Apple Support
Family Sharing and Apple ID for your child - Apple Support
Share App Store, iTunes Store and Apple Books purchases with Family Sharing – Apple Support
Parental Controls
Use parental controls on your child's iPhone, iPad and iPod touch – Apple Support