Rub with some peanut butter or salad oil. And give each child an individual, personalized plastic cup to avoid wasting paper all day long. Pieces of leftover linoleum. They're easy to cut for a custom fit, also durable and washable. Grate it or microwave it.
Pages are easy to remove for reference, splatters wipe off.
Put bay leaves or a stick of spearmint gum on the shelf. Refrigerate the soup until the fat rises to the top and solidifies. Then lift it off with a spatula. Store dearest negatives in your bank safe-deposit box. Put a name and address sticker on the film canister.