Happy/Sad Ball Kit

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Happy/Sad Ball Kit
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Happy/Sad Ball Kit

Product Number: SB33947

In Stock (Ships within 1-2 business days)


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Two rubber balls that look, feel, and squeeze the same - but try bouncing them! These intriguing inelastic and elastic collision balls are popularly called “happy and sad.” One ball rebounds normally while the other is as bounceless as a piece of clay! Instructions included.

Brand  :       Science First
Item Weight  :       0.13
Manufacturer Part Number  :       P6-1000


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