Forgive me if a thread has been started about this somewhere else; I couldn't find one.
I was reading this article on BabyCenter http://www.babycenter.com/0_cooking-with-kids_1433902.bc?scid=mbtw_post5y_8m_3w&pe=MlV3NkpuVXwyMDEzMDcxMA.. and thought I'd start a collection of recipes that can be made with children, not just because I don't have the money to buy any of the cookbooks they're recommending at the moment but also because I know that Mothering members would have great ideas to share.
My 7-year-old daughter likes to spread Nutella on bread, or lately, cream cheese on bagels.
One of my personal favorites that I'm pretty sure she could help me with if she wanted to is peanut butter and jelly. Find your favorite kind of preserve or jelly and spread it on one piece of bread (or one half of one piece of bread if you're feeding a small person who only needs one piece of bread, not two), and put peanut butter, or a different kind of butter like almond butter, on the other side.
A super easy snack that can be made by a child who has good coordination is peanut butter spread inside celery. All you have to do is cut off the ends of the celery, rinse it off, and use a dull butter knife to spread the peanut butter (or your preferred butter) in the celery.
I don't know if these qualify as recipes, since they're so simple and easy and don't have that many ingredients and don't require any cooking. But they're a start, and I look forward to seeing what others make with their children, and what their children make on their own.