Not really an AIBU just really need some help! Need to get a urine sample using a standard sample bottle from my not potty trained nearly 3 yr old. I’ve done loads of samples when he was younger but none for ages and no idea how to get him to sit still until he wees so I can catch it !! He doesn’t yet know when a wee is coming so I can’t ask him to warn me. Any ideas or tips?!