ZOOM . activities . sci . Balls and Ramp | PBS Kids - 1 views
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Heather Kaiser on 19 May 12Tamya, age 10 of Atlanta, GA wrote: At first the balls popped when we did it the first time but then after tying and trying it finally work. Nadia, age 11 of Atlanta, GA wrote: At the ball pop. then we did it again then it was almost there.