Top Ten Innovations That Changed Yo-Yoing

The biggest boom was in the 40’s and 50’s
The 90’s is jsut when everything changed

Speaking of Booms, they said that the yo-yo gets popular every 5-7 years. Which period is this?

WE are in an upswing

Is that the good part or the part where we wait for people to admire us during the yo-yo being popular era?