How to sign the contract for children's photography models?

I used to work in a children's photography shop. Usually like this, the photos taken at that time will be given to customers. If the store needs you to let the baby take these photos again, it will also be given to you, and it must be clearly written in a written agreement and put in the store for publicity. Just use the baby's photos as an album. How long can I return the photo frame after I use it? It's usually a year for you.