Gill re kids falling into a pond, perhaps an electric rail fence around the pond, if you do a web search for "Floyd pond" you may find photos of his fence, domestic water supply copper pipe mounted on wooden blocks around the pond edge. The power supply is presumably that from an animal fence NOT THE MAINS ELECTRICITY. Some may think it cruel but you arent going to be able to keep an eye on kids 100% of the time and I would rather upset a few people and shock a child than see that child drown. There are also structural grids made for child accident prevention, they go just below the ponds surface.