Remember what you liked most about physics and chemistry? Most will probably answer that laboratory work and experience demonstrations. Science is fascinating! And when there's a chance to see, touch, make yourself, there's no limit to admiration. It is well known that positive emotions enhance learning effectiveness.
I offer your attention a very useful version of the four to six-year interval with children, namely, a few very simple but fascinating and learning experiences involving a child, in which the child will receive first information on physical and chemical phenomena, some laws of nature.
1. On a clean white paper sheet, make a record of milk with a brush. Dry up the paper, make it hot. The recording will buy yellow brown and easy to read. A real game of spies!
2. The bottle fills one third of the water, adds a spoon of the soda and three spoons of the Oxus (one-time, three spoons, one-way, one-way, one-sided, one-on-one, one-on-one, one-stop a bottle of air balloons, and then either hold hands tightly or bleach. The carbon-free gas will blow the ball. The expression of the child's eye will show his admiration!
3. In the glass, pour the usual water from the crane, put the raw egg down, it'll sink. Add a lot of salt in the same water, smash and reset the egg, so the water density has increased. The child will understand why salt water is easier to swim than fresh water.
4. Write/write something on the paper leaf and put the stick in the envelope (but the stick should not be attached), the envelope will not be visible. Now take another piece of paper and squeeze into the tube (it will be our sub-trailer), try reading the written, looking at the envelope through the tube, putting it tightly on the envelope. The room should be well lit. The cut restricts the surrounding light and reinforces the interior lighting of the envelope.
5. Put some water in the glass and put a piece of ice in it, the ice will swim on the surface. Upstairs of vegetable oil, ice can't rise, it'll be between water and oil, which means it has less density than water, but more than oil.