Tall bar stool (Old birchills WS2 8)

I have a baby in a sling who wants me stood up ALL the time. 3 months later and my knees are painful from not being able to sit down. I'd love a stool to perch on without waking the baby. My kitchen is tiny so the only space available is already taken by a compost bin about 1foot high. Interested in any stool with 4 legs though.