Step 1: Parts and tools:
One Fram G8219 fuel filter (or similar looking fuel filter) ($8 at Walmart).
Two shower sliding door rollers ($2 at Home Depot, door handle and hinge aisle).
Two spring nuts ($4 for a box of five at Home Depot, metal conduit aisle).
Two springs (from a $4 box of 84 assorted springs from Home Depot).
Four #8 x 1/2 inch sheet metal screws ($1 at Home Depot).
Two #8 x 3/4 inch sheet metal screws ($1 at Home Depot).
Two 1/8 inch by 1 inch fender washers ($1 for a pack of 8 at Home Depot).
One bronze colored sawtooth picture hanger ($3 for a pack of three at Home Depot).
Two bronze colored "18-10" crimp sleeves ($3 for a box of 12 at Home Depot, audio/video aisle).
Two spade terminals ($2 for a box of 15 at Home Depot, audio/video aisle).
1/8 inch metal drill bit.
Dremel with cutting wheel (preferred) or hacksaw.
Metal epoxy (preferred) or hot glue.
Goof Off or paint thinner.
Step 2: Prep the body for legs:
Step 3: Add the legs:
The spring nuts have holes in the bottom part (the feet) through which you can insert a screwdriver for easy access to the screw heads. It will take a few tries to make the bot balanced. Just keep adjusting them until it's balanced. The springs make a good bobblehead effect.
Step 4: Add arms and ears:
The arms are made of springs with a terminal in one end. Use epoxy or hot glue to secure the terminal hand in the spring arm. These springs had bent ends. Snip off one bent end and use the other to screw the spring to the body using #8 1/2 inch sheet metal screws.
The ears are crimp sleeves held against the body with a #8 3/4 inch sheet metal screw.
Step 5: Add eyes and a mouth:
Step 6: Finishing touches:
The back has a lot of free space -- add some decals, a jet pack, other junk robot parts, or an ominous message about the upcoming filter bot invasion.