Clockwork motorboats (beware of sensible people)

On the way to work this morning I was pleased to see a huge puddle, caused by a massive downpour of overnight rain. I’ve seen the puddle on many other occasions when there has been a considerable amount of precipitation. Every time I see the puddle, I have just one desire: to place a small clockwork motorboat at the edge of what I think resembles a small lake, switch it on and send it across to the other side. The trouble is, of course, I don’t have a clockwork motorboat, but to be honest, it doesn’t have to be clockwork, it could be battery-powered. Whichever way you cut it, I don’t have one. More worrying, however, is the fact that I want to send a small toy boat across a large puddle; and even more worrying is the fact that I’m going to be caught in the act by other grown-ups who might just be a little more grown-up than yours truly. Worse still, I don't have a young child to legitimise the activity. There’s bound to be witnesses and they could come from any direction: behind me...