A switchless pneumatic engine mounted in a steam machine design.
A 8×8 crawler with 4 Motors for drives, steering, and exploration rover vehicle design.
A working lego microscope using a water drop, with dual light with down shutter.
A motorized Lego Crawler Grabber, featured drives with bogie suspension, auto tilting claw and raising and extending boom.
A small Motorized Wheel loader, featured drives, steering, light, lifted and tilted fork.
A mechanical calculator, which is capable to add and substrat, featured carry mechanism, keyboard, overflow mechanism and openable part for set up.