1, stimulate children's curiosity, let children participate in exploration activities happily and cultivate children's interest in scientific activities.

2. Guide children to observe and perceive the ups and downs of water.

3. Help children learn to express and develop their narrative in language.

Second, the activity preparation:

Pot, toy cup for scooping water, sponge, sand, cotton, pebbles, building blocks, novel toys, white paper, a boiled egg and a lifelong egg.

Third, the activity process:

(A) to stimulate children's curiosity, so that children have the desire to explore.

1, showing two big pots filled with water for children to play with toys.

2. Put all kinds of building blocks and toys into the water one by one. Teacher: How about these things? Did they sink under the water? Why does it float on the water? Please ask two children to come up and try.

3. Put pebbles and sand into the water. Teacher: What about these things? Why did it sink into the water? Please ask two children to come up and have a try.

4. Put cotton and sponge into water to guide children to observe.

(2) Children's hands-on operation and perception.

1, the child has a basket of building blocks, toys, pebbles and other attempts.

2. Help children tell their own exploration process in language.

(3) Discuss and expand experience.

1, the teacher shows a piece of white paper and lays it flat on the water. "So what? Why are you floating on it? " The teacher slowly wetted the white paper with water and watched it sink into the water.

2. The teacher shows a lifetime egg and puts it in the water to see how it looks. Show me another boiled egg and ask: What will it be like?

(4) Small experiment: an egg baby who can swim.