He snorted at the idea of a doll being called a Game Boy. "No, not a doll, although I did get dragged into a lot of games of Barbie, princesses and tea parties with my sisters once they were old enough, er, Barbie is actually a doll, generally played with by girls." He frowned, trying to work out how to explain a computer-based game to someone who knew very little about the Muggle world.
"A Game Boy is... well, it's an electronic game thing, about so big," he said, holding his hands to show the approximate size. "There's a screen with moving pictures made up of little dots and buttons you use to control it. One of the easiest games to explain is probably Tetris. It's a puzzle game, these little shapes made of blocks come down the screen and you have to fit them into lines at the bottom. You get points for every full line you make and keep going until the screen fills up. The, er, lines disappear when you finish them," he was trying to illustrate with his hands as he spoke but had a feeling he was doing a very bad job of it.