So sorry to hear this happened to you and your house, Mandee. Everyone keeps saying that they would have asked them to leave-but it's so much harder when you're there at the time-no one wants to seem rude back. I like the idea of taking pictures of what the boys did, and letting their mom know how you feel and what happened. Then, maybe suggest that they boys do chores/work in their own home to repay their parents for what it's going to cost to replace Trinity's fish, chalk, markers, and other toys that were broken. Or, maybe they get docked in their allowance to help repay for the things they broke-that way, maybe, just maybe, it will teach them and their parents a lesson on how to act when welcomed into someone else's home. It's one thing for you to be upset and have to clean up-that completely stinks-but it's even worse that Trinity will be upset and disappointed that her things were broken and used when she wasn't home
Maybe take her with you to pick out new chalk and some fish-you could take that time to have a discussion about the behavior of the other boys and what happened, (which will also help reinforce her good behavior), and it will make her a part of the process of having to replace her things. She might feel as if she's being rewarded for being a good kid and being responsible for her things if she gets to go with you to choose new items.