1) A glass
2) A piece of paper
3) A big countainer with water
We have to fill a countainer with water, then we put a piece of paper at the botton of the glass so that, it won´t fall when we turn it down. Later,we turn round the glass and we put it with the paper into the borron of countainer. It´s so important not to till the glass.
Finally, we take the glass out of the countainer and we check that the piece of paper isn´t wet.
The explanation is quite simple the air contened into the glass blocks the water to enter and arrive to the piece os paper which is at the botton of the glass.
by Marta and Isabel