It's rude to break someone's seashells.
James and his sister went looking for seashells, and she found a lot more than he did.
James wants the seashells to be distributed more evenly.
James asks his sister if she'll give him some of the shells she found.
James crushes some of his sister's shells between heavy rocks.
James' sister lets him pick out a few shells, so they have about the same number.
James' sister tries to retaliate by crushing his shells and James has to run away with them.