I have a son (and all his little buddies, too). The good news is that as they get older their aim gets much better!

The floor has probably absorbed the urine into the laminate between the planks. You may just have to replace it when they outgrow the "spray and pray" (as my ex called it) stage.

Or the area may need cleaning more often than you think it does.

Those enzyme cleaners meant for pet stains will fix your problem. Look at a pet supply store.
Linda C...6 grand sons!!

Thanks Linda-will go to the pet store when I go shopping next week.

Get Natures Miracle at any pet store. It works great on cat pee and puppy puddles!