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I just bought a toy RC sub for my two year old son off of ebay. I have to say that I'm darned impressed with it. The little sub is in the shape of Nemo (from Disney's Finding Nemo), though the box states that it is actually Keiko, the swimming fish 
As you can see from the pictures below, it is very tiny, perhaps three inches long overall. It is powered by a single AAA battery. The controller has forward/reverse, left/right functions, as well as a "super dive" button that doubles the speed of the twin motors.
I took it out last night to a little pond nearby, and I have to say, it runs exceptionally well for a $15 toy. It's fast, maneuverable, and very easy to see. I'd say that the range is about six feet, but extending the little 2" long antenna might help that.
The entire interior is dry, and houses the circuit board and battery. The fish's head pops off (poor fishy) to allow access. Sealing is accomplished via twin o-ring. I added some grease, lubricated the motor shafts, and she was good to go in less than a minute.
There are tons of potential projects for this if you've got the ability to chop and scratchbuilt, or just modify the body for a more scale boat appearance.
I must say, it's rather refreshing to have a submarine that requires no prep and that you don't need to stress about losing.
The coin in the first picture is a quarter...
As you can see from the pictures below, it is very tiny, perhaps three inches long overall. It is powered by a single AAA battery. The controller has forward/reverse, left/right functions, as well as a "super dive" button that doubles the speed of the twin motors.
I took it out last night to a little pond nearby, and I have to say, it runs exceptionally well for a $15 toy. It's fast, maneuverable, and very easy to see. I'd say that the range is about six feet, but extending the little 2" long antenna might help that.
The entire interior is dry, and houses the circuit board and battery. The fish's head pops off (poor fishy) to allow access. Sealing is accomplished via twin o-ring. I added some grease, lubricated the motor shafts, and she was good to go in less than a minute.
There are tons of potential projects for this if you've got the ability to chop and scratchbuilt, or just modify the body for a more scale boat appearance.
I must say, it's rather refreshing to have a submarine that requires no prep and that you don't need to stress about losing.
The coin in the first picture is a quarter...
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