The kid probably already seen on TV, as fire or Marines passed the obstacle course. Ask him to try his hand. As interference, you can use almost any items. In an apartment it can be a chair, under which it is necessary to crawl, table, through which it is necessary to climb the ladder to climb it, stretched the rope to jump. On the country list is endless obstacles. It ditches, logs, and dangling ropes, and much more. Look at the success of the child, but do not forget to back him up.