I assume you mean for hand in mouth puppets held above your head. We always used rolling stools. They where low to the ground between  4 to 8 inches high depending on the height of the puppeteer.  Easy to make out of plywood.  Two pieces for top and bottom of stool.  Then cut strips that about the height and join them as an X by cutting slits in the center. Glue and nail the top and bottom pieces to the X  then put wheels on the bottom of them.