Back in the day, 1968-1974, those were the hottest toy a boy had. I had 2 of those boxes full of Sizzlers. They made a plug in wall unit to recharge the cars when parents got tired of buying 4 D cell batteries per jiuce machine. Used to have half the neighborhood in my parents basement after school and weekends racing our cars on the Fat Track. Those were some of the best times being a kid.