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Endless configurations are possible with these magnetic 2.125" diameter balls and 3"-5.125" rods. Set of 30 pieces.
"Better Builders™ Standard Rods & Balls are a colorful, magnetic construction tool designed to help children discover principles of science and engineering while developing creativity!
Price: $78.96 from Discount School Supply School Supplies Arts Crafts
|Discount School Supply School Supplies Arts Crafts||$78.96||Visit Store|