Mark toys and beachwear if you want to be able to prove it's yours. It's rare, but disputes over goggles and rubber slippers happen as well as toys... My big thing is breaking the toys. We just had a little boy we know run off w/my swim noodle and use it for a dog's chew-toy at the beach last weekend.

I won't be using it to float w/again after it getting all gnawed up. The boy didn't even think to come over and apologize; I had to call him over and ask him what he did and why he thought that sort of treatment of another's stuff was okay!

In past years, we've had things buried and lost, popped, broken by mishandling, so from here on out, I plan to quiz any child wanting to borrow my~our stuff on how s/he intends to use it, and for how long, etc. So far, and we've gone to the beach a couple times since then + the pool twice, so good.