Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Designed for Cheap

The objective of the designers was clearly to make something cheap. The toothbrush vibrates, using a small 1.5V motor that spins an eccentric weight. The vibration source is in the handle. The bristles are not moving, other than what happens by way of this vibration. The on/off switch is easy to operate, but my three children dependably forget to turn them off. In my opinion, this is a waste of money up front, and the product will eat batteries as children use them up quickly (forgettting to power off)