2. ELECTRICAL CONDUCTIVITY: to show the conductivity of water is after adding a chemical of sugar.
3. PRINTED CIRCUIT BOARD: Make by simple chemical process.
4. WATER QUALITY CHECKER: To see that water conducts electric better when impurities are added to it.
5. CARBON DIOXIDE DETECTOR: Reaction with lime water & Co2 causes the change in current.
6. ELECTROLYSIS OF WATER: Separate the water into hydrogen and oxygen.
7. MODEL OF CRT: (3D Type).
8. WATER FILTER PLANT: A simple water treatment plant.
9. MAGNETIC SEPARATOR: Separate the magnetic substances from dust.
10. OZONE HOLE: A 3D model using running lights.
11. BLAST FURNACE: 3D Actual type working model.
12. LIGHT SPECTRUM MODE: Using electronic circuit.