Screw-on climbing holds.
Climbing wall not required! Chances are you have a climbing wall or two at home already!
Screw-on holds can be attached to any structure that you can use screws on. A wooden fence, play house, tree house, gyprock wall, concrete wall, brick wall, even trees, can become a climbing wall instantly, just add screw-on climbing holds. All you need is a screw driver or drill and your imagination.