Mine often decides that he's tired of whatever I'm asking him to do and starts playing light tag. He seems to only want to play "do you remember" if he's just been turned on or has been left alone for a while. Also, background noise seems to cause him to get really confused and uncooperative. Despite this, he is a wonderful toy. I'm amazed at how much he can do the 75% of the time that he is cooperating. I think of it like a pet...it's not the smartest thing in the world and it doesn't always do what I say, but it's a lot of fun when it does cooperate. Besides, I'll take changing batteries to cleaning out the cat litter any day.