This is When you Might have just a little too much time on your hands. Creating Tiny Marble Machines for years denha is an engineer living in the small Japanese town of Toyoyama in the Aichi Prefecture. He creates electronic gadgets and marble machines that use little circuits to be seemingly endless. He is showing off his collection, showing how he’s created interchangeable parts for the same machine and a variety of different slides and wooden blocks for the marbles to slide down and climb up. Here’s his Website if you’d like to try and Decipher it.