Always a highlight while waiting for fam therapy to start. I don’t know what it’s called, but I OWNED this contraption when I was 5-7 years old. You start in the top center with one marble of sorts, and then, oh so gently, adjust side knobs in ways that enable your marble to weave through the obstacle course without falling into any hole.
Today, in the few minutes I had, I got to 18. Only 42 more to go and I’ll be back baby!
I remember having one, and getting upset with it after always falling on the 4th hole. I guess I wasn’t cut out to be a surgeon.