Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I enjoy cup stacking

These are great for kids. It teaches them eye Coordination. It feels a little different than the one they sell on speedstacks.com but they are still good. This one has one big hole instead of 3 little holes. You can clip these to your backpacks belt loop or anything else. They're cheaper than the ones on speedstacks.com so I got these. These come with directions. I enjoy these.