another toy I think it's calle clackers. it's a toy that has two colored balls and you start spinning around and it hits the other ball then the ball goes around and hits the other one and you make it go faster
This one was around back in the 1960s. I believe they took it off the market because the two balls were made of very hard plastic and had this bad habit of shattering when they hit each other. Yet another of those great "evolution in action" toys like Jarts and Red Ryder BB guns.