ONLINE PLANS NOW AVAILABLE HERE!!!!
* Because this post gets so many hits from Google, e-mail me and I'll be happy to send you dimensions and rough instructions for building your own set of monkey bars.
Step 1 - Draw up plans
Step 2 - Buy lumber (not lumberjacks, a common mistake of first-time builders)
Step 3 - Hire an Amishman
Step 4 - Enjoy your monkeybars
Step 5-(optional) - Climb monkeybars to take pictures of your garden from an exciting new perspective