We have a very similar toy from Purina. This was free to 2er pack to feed. First it was only rum and our 5 year old cat did not make it interesting. Has done to my friend treats to the balls in the cubes. Then the fun was just going. She pushes the cube through the whole apartment, throws himself on the side, pushing him under shelves, inserted purely her head and running with the thing over his ears through the living room. We had such a fit of laughter, until we have freed again of the thing.
Conclusion, it is a very cheap toy and with a couple of appealing treats or dry food in it, the fun factor is huge.