I found a couple:

• Panel 1: Based on the cover of The Indispensable Calvin and Hobbes
• Panel 2:
• Panel 3:
• Panel 4: Dialogue is from 1987-10-01. Image is from somewhere else.
• Panel 5:
• Panel 6:
• Panel 7:

I think several of them might be based on additional artwork Watterson did for The Complete Calvin and Hobbes box set.