Swimming pool fences

When we cleaned our pool after summer this year, my mother-in-law told us she don't want us to use our pool again. If we can sell it we should do it. Her concern is our little man. Aside that we need swimming pool fences around our boy is always busy and pre-determined to do stuff in his mind. Prevention is better than cure. She got the point! Well, let see how things goes in the next summer.