You will need:
Foam to cut the aeroplane parts out of
An electric motor
A small battery or power source
some copper wire
Thin string or Fishing line
Step 1: Cut the Aeroplane Parts Out
Step 2: Make Space for the Electric Bits
Step 3: Put It All Together
Tape the wing into the slot underneath.
Now, attatch that string or fishing line from a hook on your ceiling or something else to tie it to. Then connect the hanging end to the aeroplane. Make sure the aeroplane is secured to the string so it wont slip off and also make sure that the string is attatched to it at the Centre of Gravity. You can find this point by balancing the plane on 2 fingers.
Switch it on, give the string a light twirl from the top so that the craft begins to move in a circle realistically, let go of the string and watch it fly in a circle for a long tome. Try not to hypnotize yourself while doing this. I apologise for the bad quality pictures, my phone can't focus on moving objects.