also greatly increases the variety of activities that may be played on playground structure 10 playground structure 10 is used by grasping one handgrip assembly 22 in each hand while standing on one of launch platforms 26 the user then steps off launch platform 26 so he is hanging from handgrip assemblies 22 by placing weight principally on one handgrip assembly the user can slide the other handgrip assembly forward along one of rails 18 the user then transfers his weight to the forwardmost handgrip assembly 22 and slides the other handgrip assembly 22 forward this weight shifting and sliding continues until the user traverses the length of rails 18 and reaches the other launch platform 26 from these basic maneuvers a virtually infinite number of variations and activities can be played by both the individual and the group referring now to fig3 a and 3b handgrip assemblies 22 will be described in more detail each handgrip assembly 22 includes a body 36 two domes 38 and two handles 40 handgrip assemblies 22 are preferably constructed of a plastic material and are bolted or screwed together from two halves each half of handgrip assembly 22 is essentially identical to the other half each half of body 36 has a c shaped cross section with a cross sectional major axis oriented vertically.