眼力大比拼

请根据提示，猜猜这4张图都是什么。

1. It’s sweet. It’s made from flour（面粉）， eggs， butter（黃油） and sugar.

2. It flies in the sky. You hold a long string（线） when playing with it.

3. It shows time. We wear it on our wrists（手腕）.

4. It’s a thing for children to play with.