15-year-old who became millionaire by inventing card game at 7, sells it to toy firm
A 15-year-old boy named Alex Butler, who became a millionaire after inventing the card game 'Taco vs Burrito' at age of seven, has sold the game to PlayMonster. The deal amount wasn't disclosed but 15 lakh copies of the game, which costs $20 on Amazon, have been sold to date. "It was never something I've been attached to," Butler said.