this is a knex clock that uses 4 of the following : green connectors, snowflake connectors, right angle connectors. 2 of the following: straight connectors, stub connectors. 3 white rods, 2 yellow rods, 12 blue rods, 1 clock motor, and 1 battery. it is a pretty decent clock but the only thing is that it doesn't have the numbers on it. down below are the pictures. hope you guys like it!