1. Use modelling clay to stick a candle upright in the centre of a small plate or tray.
2. Pour water in until it is about 2cm deep.
3. Light candle and place a glass/glass jar over it. The rim of the jar must be under the water, resting on the bottomm
4. Watch the candle flame carefully as soon as the jar is in place.
You will see the water level rise inside the glass/jar. It does this to replace the oxygen that was used up by the burning flame.
Once the oxygen is used up, the flame goes out.
Try this, it really works. We did this yesterday and the water is still inside the glass.
Let me know how yours turn out!