A friend of mine had the same concerns and he bought a 4x8 sheet of exterior plywood, ripped it into 3 ea. 16" by 8 ft strips, painted them to match the house, and screwed them to each side of the 3 sided tower. The kids would have to really tall to get over the panels. Just a thought! Remember, free advice is almost always worth the investment! K3PID Ron H.