Give your muscles a revolutionary workout with the Science Museum Strength Ball.

Using hand rotation, spin the internal gyro and challenge yourself and others to achieve the highest revolutions per minute. Pull the red cord to spin the gyroscope inside the ball. Rotating the ball in your hands increases the rotation of the gyroscope.

The digital counter measures the speed of the gyroscope and displays the number of revolutions per minute (RPM)

Science Museum Strength Ball features:

• Gyroscopic exercise ball
• Built in rev counter
• Shows RPM/Highest RPM achieved RPM achieved 0-60 seconds,
• Pull string
• Suitable for 10 years +