Wizzzer
The Wizzzer or Wiz-z-zer is a gyrostat toy introduced by Mattel Toymakers in 1969, and introduced the spinning top to modern children. The "twist" (innovation) was the use of a super-spinning, high-tech bearing, that allowed the top to spin at very high speed and remain standing for a long period of time. This top did not rely on a string to attain high speed so it was easier to master than tops of old. Wizzers are not sold as scientific instruments, but may be used to demonstrate the conservation of angular momentum and gyroscope stability. (Wikipedia).
