Uh, what? My daughters were making PB&J sandwiches in Kindergarten - so at 5?

At 8 mine could cook on the stove. Things like grilled cheese, eggs, mac n cheese etc. 7 is definitely old enough to make a sandwich.

LOL

My fifth grader usually bribes the second grader to make hers, so really your question should be "age to not longer make a sandwich."

By 7 DS was helping me prep and cook dinners. It won't be a great PBJ most likely, but I'm assuming it is just for him. Making sure he cleans up after himself is part of the process too.