1. Catch fireflies.
#1201 How Do Fireflies Glow?
2. Make S'mores.
#277 Why Are They Called "S'mores"?
3. Go to a baseball game.
#751 Where's Your Favorite Ballpark?
4. Make ice cream in a bag.
#92 Why Do You Get Ice Cream Headaches?
5. Go on a picnic.
#258 Why Do Ants Think They're Invited To Picnics?
6. Go bowling.
#1072 Why Are Bowling Shoes Slippery?
7. Go fishing.
#1213 Do Fish Sleep with Their Eyes Open?
8. Make root beer floats.
#1219 Why Is There So Much Foam in a Root Beer Float?
9. Have LEGO building competition.
#639 Who Invented LEGO Blocks?
10. Go to the zoo.
#643 Where Is the Largest Zoo?
11. Make a time capsule.
#525 What Time Would You Travel To?
12. Learn how to play a new card game.
#756 Do You like To Play Cards?
13. Go see a fireworks show.
#550 How Are Fireworks Made?
14. Go to a drive-in movie.
#249 What Movie Would You Play At Your Drive-In?
15. Fly a kite.
#157 Who Invented the Kite?
16. Make a bird feeder.
#144 Do All Birds Fly South In the Winter?
17. Make friendship bracelets.
#301 How Do You Make a Friendship Bracelet?
18. Make homemade bubbles.
#57 Why Do Bubbles Float?
19. Camp in your backyard.
#27 What Would You Do on a Staycation?
20. Make a family video.
#1127 How Do You Capture Memories?
21. Make homemade instruments.
#704 Can One Man Be a Band?
22. Play tag.
#815 Do You Like To Play Tag?
23. Have a puppet show.
#574 What Are Shadow Puppets?
24. Go to a local farmer's market.
#649 What Does Organic Mean?
25. Have a family talent show.
#684 Are You Talented?
26. Go on a scavenger hunt.
#359 What Is a Scavenger Hunt?
27. Homemade family pizza party.
#154 Who Created Frozen Pizza?
28. Play miniature golf.
#353 Why Do Some Golf Courses Have Windmills?
29. Make tie-dye shirts.
#385 What Is a Hippie?
30. Read a book in a hammock.
#658 How Do You Make a Hammock?
31. Go for a boat ride (canoe or paddle boat).
#855 How Do Boats Float?
32. Tell ghost/scary stories.
#284 What's Your Favorite Ghost Story?
33. Put together a 1,000 piece puzzle.
#857 What Puzzles You?
34. Cook dinner over an open fire.
#640 Do You Like To Cook Outside?
35. Go stargazing.
#182 How Many Stars Are In the Universe?
36. Paint self-portraits.
#464 What Makes Art Priceless?
37. Go to a farm and pick fresh fruit (strawberries, blueberries, etc.)
#288 Why Does a Strawberry Have Seeds On the Outside?
38. Go swimming.
#957 Can Swimmers Get Dehydrated?
#272 Why Would You Work For Free?
40. Watch the sunrise/sunset.
#1132 Why Is Dusk Mysterious?