Here I´ll show you how to build a cheap desk with few materials and tools.
Step 1: Step 1. Gathering materials and tools
1 tubular chair, that can be obtained for cheap in a flea market or from used furniture store (just the frame will be needed) ~$10.
1 wooden board 60 cm x 80 cm or just a little bigger than the frame (~$4).
4 Phillips flat head screws for wood (30mm long max.) or similar to fix tubular frame to wooden board ~($1).
1/2 Liter of preferred color paint, or you can just leave it as it is, the wood smells always good.
2 Plastic belts (10 cm and 12cm)
Optional: 1 aluminum tubular profile 2.5 cm x 100 cm
1 aluminum rolling door profile (C shape) 4.5 cm x 100 cm
2 Phillips flat head screws for metal (30mm long max.)
1 aluminum bicycle bottle holder and screw, a plastic one can be used too, but for experience is kind of weak to hold a bottle of half liter of German beer, :-).
Electric screwdriver and bits, or manual.
Saw for aluminum
Driller and bits in case of need flat monitor stand