Click-click-click all day long on the chaise longue. The world doesn't really need another fidget toy, but hey, it's only 2 grams.

Print in PLA using a 0.4mm line width. Insert the inner piece into the outer piece. Position the inner piece to one end while you insert each little dog-bone piece into the notches. (You may need to pinch the body lengthwise to work the dog bones into place.) The whole thing is held together with friction. Click away!

UPDATE (5/17/22): I've made a few tweaks so it is less likely to fly apart if you push on it the wrong way.