Musashi and Bob

This is a show about a guy named Bob who built a time machine in his shop. He travelled back in time to feudal Japan where he happened to meet a samurai man. The samurai said "Musashi is my name. I was here meditating when magically you came!"

"My name is Bob," said Bob, "and magic it may seem, but I came here in a time machine." And in a bright flash of light, they both disappeared. Musashi travelled forward four hundred years. With a broken time machine here stuck is he, so he lives with Bob and his family.

Production Notes: Try to guess what actual function that time machine prop serves.