Our Crash is about 21 inches and just over a pound (482 grams) and acts like a kid jumping - from me to hubby, from ground to couch, all over his viv from branch to hidelog, from recliner to endtable, etc.
he jumped a foot from my husband to me in late Sept., and scared the bejeezus outta me, a pound of dragon mid-air comin' atcha is freaky! But we supervise him well when he's out playing wildman in the livingroom, just to keep him safe (we use mesh babygates to block doorways ... as long as your baby doesn't have sharp branch edges or long drops, sounds like he's just "being a kid"? :lol: