Why do young WWE fans (about 12 and under or maybe a bit older) like Undertaker so much?

He doesn't talk, they haven't seen him in the past, he's just a wrestler lol. I don't get it though, seriously. The other night I was at a Smackdown/ECW house show and the arena was 65% filled up with kiddies. Once the Undertaker went against Khali, throughout the whole match the entire arena and I mean every pedestrian there was chanting 'taker' and stomping their feet on the ground for him. No one did that for anyone else!