I found a journal from 4th grade. It was an assignment book where the teacher would give the prompt like: "I like dogs because ____" or "The food in the cafeteria makes me sad because _______".
The first entry had this prompt:
If I could invent anything it would be _____________
Now, keep in mind it says anything. What would the 10 year old Adam invent if he had the power to invent any one thing that could be used in our world. Cure for cancer? Teleportation device? A functional and affordable e-book reader? No. No. No.
The Squirting Light bulb.
It's a light bulb that squirts water.