This set includes four balls with a diameter of 2.5 cm each, but features various masses, including a hollow steel ball, solid steel ball, plastic ball and aluminum ball.
- Race the hollow steel ball and solid aluminum ball down an incline. They have about the same mass, but the solid aluminum ball has a much larger acceleration down the ramp.
- Fire the yellow plastic, solid steel, and hollow steel balls from a PASCO Projectile Launcher.
- 1x Solid Yellow Nylon Ball (10 grams)
- 1x Solid Steel Ball (66 grams)
- 1x Hollow Steel Ball (21 grams)
- 1x Solid Aluminum Ball (24 grams)
WARNING: CHOKING HAZARD!
Contains small balls. Not for children under 3 years.