When I spin them separately they all work fine, but when trying to stack them, the second biggest one always falls. I noticed that that spinning top has a crack near the tack in the bottom so when I spin it on the floor, it works perfectly since it's the tack that touches the surface of the floor but if I try to stack them, that flaw makes them unbalanced and they fall. I'm forced to stack the third next to the first one and leave the second out...
The white spinner easily breaks off pieces inside the spinner. The idea of stacking is great. My grandkids love it. The white spinner should be sold separately so I could stock up on it. It’s a great coordination activity for young kids.
We have been through two of the spinners so far because we use it so much. It is plastic, so a lot of wear and tear can mean the plastic breaks. For what it is, it is durable. I wish I could just buy the spinner though without having to rebuy the whole thing.