This remote controlled yellow submarine was used in a cheesy scene in a children's swimming poop as if it was the ocean.
How and why we buy some of these props is quite another story, but here it is and it is available if you want to do something similar, have a child playing with it or make it look real.
It is small, yellow and fully operational. It moves forward, reverse and it turns left and right. The dive feature can take it to different water depths or on the surface.
The units contain rechargeable batteries and are charged by a 5volt USB cable.