I offer a sketch of the room sports equipment for children 5-8 years: “double” the horizontal bar or uneven parallel bars. The main advantage of the simulator is that it can be dismantled in a minute and clean under the bed.
The structure is assembled from water pipes of 0.5″, only the locking sleeves used sections of tube 3/4. Bushings holes for fixing bolts-lamb, which in these places is welded at the nut: they want to set and change the height of the cross-rod. Locking rod is easy and with easy pin — it is enough in the sleeve and struts to neverlet him under the hole.