Marble run blocks plans and a jog wheel on

and a jog wheel on allows for changing the numbers more quickly

you can also put the 3/8" stock directly into a fully opened 1/2" drill chuck

The engine can be built from solid birch plywood

including over 120 photos of the construction

This jointer is designed to be buildable mostly from parts of an inexpensive 12" thickness planer and wood

Marble run blocks plans and a jog wheel onThese marble run blocks are designed to build a variety of marble runs. Unlike most set of marble run blocks you can buy, these blocks include a "pumping unit" that raises marbles at the push of a lever. Also, these blocks are designed to use as little vertical height per block as possible, so that you can make longer runs without getting too tall. I originally designed this toy for a toy company, but it appears the toy company has lost interest, so