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Swing one steel marble back, let it go, then one will swing out the same distance at the other end. It demonstrates Newton's principle that "action and reaction are equal and opposite", causing the beginning of perpetual motion that dies down only as a result of friction. So interesting process to watch that you may be mesmerized for hours!

Take this classic desktop display piece for your office decor, bring a daily dose of inspiration into your life.

NOTE: Suitable for age 6 years old above.

FEATURES:

• Makes a great desktop gift
• Often used as a toy to amuse people
• Includes steel balls, plastic frames and base
• A great distraction and fun piece to watch for all ages

SPECIFICATIONS:

• Condition: Brand New
• Material: PVC base & Stainless steel ball & Fishing line 
• Color: Red brown & Silver
• Size: Approx. 17.5 x 14.5 x 11cm

PACKAGE CONTENTS:

1 x NEWTON'S Cradle Balance Balls Desktop Toy