Here they are:

1. Light Entertainment I: About refraction but the simplest of the four.
2. Light Entertainment II: About refraction but considerably more challenging than I.
3. Light Entertainment III: About refraction but a little different from the above two.
4. Light Entertainment IV: About refraction but the most challenging of the four.
5. Hot Day: About energy and energy transfers.
6. Accident in Space: About Newton’s Laws of Motion.
7. Propelling the Boat: About Newton’s Laws of Motion

Enjoy!

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