Acceleration of Freefall Kit
Galileo had great difficulty measuring the acceleration due to gravity but you can do it by comparing a free falling object to the swing of a pendulum with this kit and a ring stand. Acceleration of Freefall kit contains a meter stick with eye hooks at each end for attaching string along with plenty of string and a 3/4" ball with hole. It also includes a piece of dowel with necessary attachments and a clamp to attach the whole thing to the ring stand. If only Galileo had come across Arbor Scientific.
Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.