tl;dr Tilda gets a gelatinous cube to kill a skeleton for her.
I’ve been running Tilda, 8 year old daugher, in a little pseudo D&D. Last night her elven archer made it to the dungeon throne room. About 50″ wide and 150″ long. 3 giant pillars, toilet paper rolls, running the length of the hall and at the end a thrown with a headless statue, Lego figure missing a head piece :).
Her elf enters and starts exploring checking out the runes on each collum. She gets to the 3rd colum and makes a Dex check, jumps out of the way of a gelatinous cube. She then starts wandering around the cube trying to figure it out but eventually gets her book caught. She imediately slips the boot off. She eventually figures out that the cube is digesting her leather boot and that the cube slowly follows her.
Next she goes to investigate the throne which has the headless body, actually a skeleton in armor. She pokes it with an arrow and the skeleton starts following her. The cube was also following her slowly. She then runs to the cube making sure the skeleton is following. Runs around the cube letting it catch the skeleton!
I was floored. Tried to figure out if she had seen a gelatinous cube in some book or show but no. Then the same for the idea and no. It just made sense to her. Pretty damm cool.