beams 16 18 and 20 22 spaced apart by a preselected distance these beams may be made of wood metal or any other weatherproofed material for example the inventor has found that beams made of recycled plastic is particularly useful for this purpose two strong cables 24 26 made for example of galvanized steel are secured in parallel by any well known means between beams 16 and 20 two similar cables 28 30 are also secured between beams 18 and 22 as shown these cables are inherently somewhat flexible alternatively rods may be used instead of cables as shown in more detail in fig3 a plurality of handholds 32 are attached to cables 24 and 28 and hang downwardly these handholds 32 can have a variety of shapes or configurations in the figures handholds 32 are in the form of cells described in more detail in my co pending application ser no 688 944 entitled a modular architectural structure for playgrounds and the like briefly each cell 32 consists of a generally square body 34 with a round hole 36 in the middle along two of its edges cell 32 has rectangular cutouts as at 38 at the other edges the cell 32 is provided with matching tongues 42 the edges with the cutouts are provided with through holes as at 44 the tongues 42 are provided with similar through holes as at 46 as shown in fig3 the cable 28 passes through holes 44 and cable 32 passes through holes.