'He agreed to buy me replacements... then backtracked': Brother refuses to cancel sibling's debt after his kids ruin expensive art supplies

These siblings were trying not to argue in front of the kids, but they just can't agree on who needs to repay who. 

Children will get into everything that they can. They don't always understand the concept of valuable items. They have no problem throwing food on the floor, breaking plates or vases, or keying your car, just to name a few examples. Their brains simply aren't developed enough to know why some things are more important to grown-ups than others. That's why it's usually the responsibility of the adult who's keeping an eye on them to ensure they don't run wild. 

These two siblings just can't seem to work out an agreement about how to pay each other back. It's partially because u/CSmith100000 owes their brother about $300… but the brother's kids decided to "play" with the original poster's art supplies. To the untrained eye, a brush is a brush and paints are paints. But the kiddos ruined some really pricey art supplies: replacing them with dollar store watercolors or Amazon brushes just isn't going to cut it. 

After you decide who's wrong in this scenario, check out a bunch of major fingernail painting fails that were totally not worth the money.