It's funny this thread should appear, after much consideration I actually took my son (two year old) up for the first time last week. Flew to Campbeltown from Blackpool in an SR20 G3 GTS, he'd fallen asleep before we'd even taken off! Woke up on final approach. However he was awake for the entire return journey and loved the novelty of wearing the headset; crew isolation button on the radio came in handy as he's a little motormouth at the moment! Saying that, Scottish didn't seem to mind much when I forgot to hit the button before transmitting, was quiet up there mind! The few short RT interuptions even raised a 119.875 chuckle a few times! Had him sat on a normal car booster seat and he seemed to enjoy looking out at the clouds and mountains. Definitely think he is still too young to fully appreciate what is actually happening so it probably won't become a regular thing for the time being, but was very nice to go flying with the whole family for a change!