I had an idea at school to dig a tunnel through the centre of the earth and out to the other side. I would then drop things down it and since the object would be moving faster as it passed through the core, gravity should have less effect and it should shoot out of the tube and into space then other side. It could have been used to dispose of nuclear waste or defend Earth from asteroids but it never materialised.
A childhood belief about physics

others believed things like this
- I thought if someone hadn't passed the Law of Gravity, we would all be floating around in space.— Trudee
- I used to believe that there was only one lighthouse in the world and it was at the centre of the earth. Anon
- When I was about 4 and I saw the clouds moving sideways, I thought that Earth was moving closer to the Sun— Helen
- I used to believe that when I saw the clouds moving in the sky, that it was actually the earth moving. — Megan Gilbert
- When I saw that the clouds were moving in the sky, I thought it was because of the rotation of the earth.Anon
- When I looked up in the sky and could see the clouds moving I used to think that it was the earth spinning.— JOhn