We happened to stumble upon this very cool spot while making our way to the market. When you walk in you are greeted with beautiful glass sculptures and trinkets. It's a smaller shop and as we walked further in we saw very very hot kilns which seemed a little treacherous. It was definitely safe, but we could still feel the intense heat coming out of them from 20 feet away.
We were lucky enough to see a demo of glass being made for a class that was about to start. Very cool process to see melted glass harden and transform into a class drinking cup and then into a bowl.
I don't have a frame of reference what is expensive for a glass making class, but I think it was about 2 hours of demo and make your own glass for over $100. If I ever come back to Cleveland though, I probably give this a shot!