One day, upon the insistence of Mokuba, Kaiba and he were at the park. Mokuba decided to go on the swings and wanted his older brother to go on them too. Of course he protested, not only did he think that he was too old for the swings, but Joey and the others were there. Joey had taken the middle swing, so Mokuba and Kaiba had so separate. Joey was having a lot of fun and so was Mokuba, who noticed that Seto wasn't. So he decided that his older brother was going to enjoy himself.
"Common Seto, play, start to pump your legs and swing. Please, for me?" and he started to whimper like a little puppy, which as usual, made Seto cave in. Seto started to swing only to hear Joey say "Weeeeeeeeeeeeeeee" after Kaiba got to a certain height, knowing full well the tall brunette could do nothing about him acting so childish.
"Grow up Wheeler," was all Kaiba said before his inner child took over, thus making Kaiba yell out "Weeeeeeeeeeeeeeee" himself. Joey and the others all stopped dead and stared at Kaiba, as though he had just grown a second head.
"What, just cause I'm rich doesn't mean I can't have fun," he declared, then called out "Weeeeeeeeeeeeeeee" again and started to have the time of his life.