Good grief, can we not empathize and share here without hitting all the key points exactly? FWIW it doesn't sound "completely different" to me. The annoyance and disappointment of having your child excluded from a fun activity due to their age. Yes sometimes it's because they mightn't mix with the older kids. Sometimes it might just be because you come across a stickler for arbitrary rules. Same annoying result

But, sorry Stef, you can't post your harmless story and cheery 'good luck' in this thread without criticism as it's only 75% similar to the OP's. Rules are rules I'm afraid