The Hexbug larva is definitely one of my favorite HexBug robots. It uses an infra red eye to avoid obstacles and it's very life like. The pulsating body motion is very realistic and it's great for scaring girls around your house. It sells for about 15 bucks and it's well worth it so check it out. He's actually pretty fast and really good at avoiding obstacles. Like most HexBug robots he uses 3 watch batteries and isn't remote controlled, however you could theoretically build a remote for him that sends out pulses of the same infra red light that his eye sends out.