Lol, I lay it down (on the bed, ground, back of the wagon - wherever lol) and get DS to lay on it and I put his leg in the spot where it should go.....then lean back so I'm almost laying on DS (get some funy looks lol), do up the waist buckle, pick up the other arm strap and put it on - and off we go lol!!

FWIW DS thinks its classic and laughs hysterically!