In a sense, daydreaming in poetry can be understood as daydreaming, and poetry can sometimes be unreasonably wonderful. Children are often stupid, and sometimes this stupidity is a daydream. For example: I want to have a good sleep among the flowers; White clouds will be warm in clothes; I chased the sheep to the mountains and the sheep to the sky. The grass on the ground is green and the grass in the sky is blue.
The discovery lies in the subtleties and needs careful observation. Sometimes you have to have a whim. For example, fish is in the upper reaches of the sky and birds are flying in the water.