Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Waste of money in my opinion.

My son had a plastic slinky before this one. It didn't last very long. I got the metal one thinking that it would. I was mistaken. In a matter of weeks he had managed to get this so tangled up that we had to bin it. It was impossible to get it untangled. The toy has no apparent educational value and the novelty of watching it 'walk' wears off after a few times. I would not purchase another slinky no matter how he bargains!