UPDATE: Make sure the rubber seal is perfectly in place between the cabin and hull when you tighten the boat after replacing the recharged battery, I noted that the boat was riding a bit low in the water, and discovered I didn't have the rubber seal set properly, and some water got in. The boat ran perfectly for that day and the next - but a few weeks later the motor wouldn't run on a fully charged battery, and there was a white corrosion on the motor. I will try my hand at restoring the motor, but if that fails, replacement seems easy,-A ton of fun for me and my 3-year old grandson! Really goes like a rocket, although he needs help on steering it.My 26 year old son had a ball using it with him, too. He did complain, ""you never bought one for me when ***I*** was his age!"" But 20+ years ago, a RC boat would cost hundreds of dollars.I took my eyes off him for a few seconds, though, getting his fishing pole ready (3 year olds have short attention spans!) and the motor sound suddenly stopped. Where is the boat, Nico? No answer. Scoured the shoreline, looked far out on Lake Tomahawk - nada. I don't think it sank - the sealing ring is pretty good, never saw a drop of water inside. I thought it might have hit weeds, which can stop the prop - and kill the battery if you try to power out of them - but couldn't see any sign of the fouled boat.Ordered a second. This is too inexpensive not to get another for him. That's what grandfathers do.Biggest complaint - seller doesn't offer to sell you a spare battery on Amazon.