Sit-rite wooden step stool Free 3D model

Kids chair i designed about 6 years ago, i was sitting in a doctors waiting room for way too long, saw a neat kids chair which was adjustable for diff body sizes...took some pics with my cell phone and used a ruler propped against the chair for scale references, then i modelled this one and made a few chairs for a playschool down the road, worked out nicely. The 1st chairs were made of 12mm ply wood, well that was way too flexable so re made them out of 22mm ply...way better but a lot heavier!