Instruct: Classify Amazon reviews into positive or negative sentiment
Query: took 2s for my son to start using

First thoughts:So it took my 5yo son two seconds to start using it. I asked him what he thought and he said he likes it.The only thing is it does take him some "reaching" in order to click.So he uses two hands.Will follow up later....(above mar 13 2012)-----------edit 10/4/2012so far it still works.When I use it, I feel its a bit taxing to press the buttons.I may switch to a different trackball soon. It becomes difficult to use. Still, its great for beginning (small) children because of the large yellow ball.Buy it for your small child. Then ebay it.