How to make Domino row building machine from cardboard for school project

How to make domino row building machine from cardboard for school project by Black Robobrain In this video I show you step by step how to make full automatic wooden domino row building machine from cardboard at home . Things required - 8 bottle cap , bicycle tube ( for wheels) - cardboard - bicycle spoke - super glue , glue - pulley ( 1 big ,1 small) ,gear (r=1 -