1. 25 nut bolts
2. 4 big nut bolts
3. 1 old mobile phone charger 5volts and 500mA (that you don't mind destroying)
4. 1 metal plate (that you don't mind destroying)
5. steel wire (around 5 feet will do)
6. 1 used coca cola plastic bottle (2 liter preferably )
7. 1 12 volts dc motor
8. 1 jam bottle (250g) cap
9. 1 pvc pipe (around 15cm will do)
10. scrap electric wire (20 cm)
3. Metal cutter
4. Paper cutter
5. Drill (You can always drill a hole in pvc pipe by using a hot nail if you don't have a drill, also use nail and hammer to drill holes in metal sheets)
6. Screw Driver
Step 1: Making outer ring
To mark where to drill holes in the ring, what you can do is trace the ring from outer edge on a paper.
Now you have a circle but don't know it's center. So make two random chords on your circle and make perpendicular bisectors on them. Perpendicular bisectors from them meet at the center. Now you can easily locate the center and can use a protractor to make spokes from center to circumference such that they are 30 degrees apart.
Drill 12 holes in the outer edge such that they are 30 degrees apart from each other.
Make sure that sharp portions of stainless steel plate are properly dulled as soon as you finish cutting it to avoid any injury from sharp edges.
Caution: Be very careful while using iron cutter and don't cut your fingers as it hurts...........a lot!
Step 2: Making the cage
Step 3: Making the cage continued
Drill 12 holes in it . Make sure that all nuts are tighten before you insert outer ring in it.
Step 4: Fan making
Make sure to bend each blade of fan at 30 degrees so as to make them throw air when they rotate.
Step 5: Making of base
If you don't have aluminum sheet never mind. You can also use bare wooden plank alone but you have to make arrangements somewhere in the canopy to hide electric wire joints that you make with the adapter.
If you don't have a plumbing pipe you can use the one electricians use to make wires go through them. It will also suit your purpose.
Upper two holes are to hold motor assembly and protective cage and lower two are for fitting to aluminum base.
Step 7: Making shaft for fan
Step 8: Motor fan assembly
Step 9: Attaching motor to the pvc pipe stand
Notice that both upper bolts are used to hold the cage and only upper bolt is used to hold the motor assembly.
Its tricky to fit both of these in the bolts. A helping hand from another person is always appreciated to make this task simpler.