Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fun, but watch out for battery use!

This toy is great fun for my 11-month-old. He was a little frightened of the balls popping out at first, but now loves to gather up the balls that scatter everywhere and put them in the funnel. My only complaint is that it uses up the batteries quickly. It will still run on weakened batteries, but doesn't have enough "oomph" to push the balls through the system, so the parent ends up forcing them through. But when functioning at full power, my son LOVES this!