Billy Burke made three toothpick amusement parks while being held in Folsom Prison, this likely being the largest. He once made a roller coaster out of shotgun shells. Various wardens over the years would bring in visitors to see the construction. In 1994, the Sacramento Bee told his story which you can read HERE.
Toothpick Circus by Billy Burke Real Photo Postcard circa 1950 Collection Jim Linderman