At the tree house: To integrate the roots of the trees in the floor I built the floors at all different levels, so watch out you steps. To get to the upstairs room you use the steel expansion cable bridge. The room is built about 4 meters elevated of the ground. To get up in your room, you have to watch your step and use conmen sense. Especially when it rains the steps can be a little slippery, but anti slip strips on the steps help you to get better grip. Kids can not use the bridge as a play ground.