I have played with this some as have both of my kids. It is very hard to move the balls because the foam instead if very dense. The balls can get stuck under the plastic and then it is very hard to push your fingers underneath to get them to pop out. I expected things to move more easily. Given how challenging it is to move, is my kids gave up on it. I haven't used another version of this, so I cannot speak to whether this is easier or harder to move than others.
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