It's good to test things out before you use them.
Tim gets a new remote-control boat from the hobby store that is much nicer, and more complicated, than anything he has ever used before.
Tim wants to try out his new boat.
Tim takes his boat home to get a feel for it, in his bathtub, before he takes it out into the river.
Tim takes his boat straight to the river and puts it in the water to try it out.
He gets a feel for how the boat operates, and he learns about its power at home, and when he takes it out he has a great time.
The boat stops working when it is too far from shore to retrieve and Tim realizes it was not fully charged, so he loses his boat.