Intro: IKEA Hackers: MARIUS Street Sign Side Table
This hack is very straight forward:
Drill four countersunk holes into the street sign (use the original seat as template)
Assemble the legs and bend them a bit outwards (makes it a bit more stable)
Mount the sign onto the legs, using the four round plastic parts as spacers.
Power drill with drill bit (5mm)
MARIUS stool from IKEA
screws and washers