D.I.Y exhibition at London's Olympia.
M.S. & C.U. man demonstrating small plane which uses old razor blades. It is called a David Four. M.S. & C.U. part of demonstration on the 'Make Home-Made Beer' stand. M.S. & C.U. man demonstrating wrought-iron kit for lampstands etc. M.S. Two men demonstrate uses for the uni-fold ladder. Its makes an extension ladder, steps, trestle board etc.