I made three or four biological models in grade one, namely, lung breathing model, nephron model, different bird claw model and seed structure model (the first time I did it badly). These can be considered. If the teacher doesn't ask that it must be related to the content of the study, personally, I think the bird's paw model is the easiest to make. During the game, I pinched four kinds in half an hour and left 40 minutes to write a commentary.

If you plan to make a bird's paw model, you can buy a large piece of clay (it is best to make it as hard as possible after you finish) and a hard board for placing the model.

1. Divide the clay into pieces of equal size, and divide as many pieces as you want (don't be too small to stand).

2. Search the Internet for several representative bird claws (such as those of woodpeckers, crested pheasants and ring-necked pheasants) and imitate them with clay sculptures (don't pinch out each finger claw first and then put it together, which is unstable and unsightly, but do it in one go).

3. Dry the bird's paw model, draw lines and so on, and finally stick it on the hardwood board, OK.

G's paper on bird's paw model is also easy to write. Just write and observe the different bird's paw structures in different living environments, and just give a few chestnuts.