Originally Posted by 2MuchMark

He could demonstrate the double slit experiment if he has access to a few basic tools that the science lab at his school may have.

If he needs a really simple and cheap demonstration he can show how using 2 pairs of 3D movie glasses turned at 90 degrees from each other cancel light, and how. 3rd pair added to this and turned 45 degrees let’s light pass through again.

Google them.

Both demonstrations produce mind bending results and show the amazing world of quantum mechanics, waves v particles, and probability waves. It doesn’t demonstrate quantum entanglement sorry but this is all I know . For now. ;)