Find a book that contains (either on the cover or in the title) an example for each category. You must have a separate book for all 20, get as creative as you want and do it within five minutes!!
Season ♦ Color ♦ Celestial Body ♦ Something That Grows
Okay, so this too a lot longer than 5 minutes. Which made me wonder, who could even do it in that time? Because for me, it takes a long time to find the right books. This time around I tried to do it, completely in books I own. But I didn’t have any for the season, celestial body and things that grows. Maybe third time will be the charm, if there is a next time.