Season 7

1. Roller Coaster; Quicksand; Jelly-Side Down; Lemons; White Tiger

1989-10-14 · 30m

2. Bee Stings; Bowling; High-Speed Elevator; Lemons; Boa

1989-10-21 · 30m

3. Race Cars; Spider Webs; Lemons; Tropical Fish

1989-10-28 · 30m

4. Rain Forest; Buoyancy; Pouring Catsup; Lemons; Cold Remedies

1989-11-04 · 30m

5. Caffeine; Butterfly Migration; Autumn Leaves; Lemons; Doppler Effect; Sloth

1989-11-11 · 30m

6. Surfing; Geothermal/Volcanoes; Luau; Sugar Processing; Hawaiian Language; Eel

1989-11-18 · 30m

7. Whale Watch; Sunspots; Lemons; Skunk

1989-11-25 · 30m

8. Milky Way; Epilepsy; Lemons; Inventors Fair; Cuttlefish

1989-12-02 · 30m

9. DNA; Rube Goldberg Contest; Parrot Chat; Chewing Tin Foil; Seahorse

1989-12-09 · 30m

10. Marathons; Celestial Navigation; Cataracts Chat; Lemons; Echidna

1989-12-16 · 30m

11. Spinal Cord; Glue; Lemons; Dog Behavior

1989-12-23 · 30m

12. Cheese; Aging; Appendix Chat; Wolves

1989-12-30 · 30m

13. Supercomputer; Greenhouse Effect; House Creaking; Owl

1990-01-06 · 30m