this was created for a specific purpose. I needed a narrow step stool for our bathroom. It also had to be three year old proof.
I wanted this to be simple but with a twist. making the legs round seemed to be both. There are 9 that are 1 1/2" diameter by 6 1/2", 14 1/2", & 22 1/2". 3 of each. all of these were done with 2X4 ripped in half. I used scrap stuff but one stud new would make all of them plus the tiered leg. If you don't have 1X4, glue two 2X4's.