Step 2 - Give them anything to shoot with up to and including a literal potato.
Step 3 - Be amazed at how good of results they get.
Look, I love my iPhone and my Nikon. But at the end of the day in most photography forums you'll see the recommendation to "use what you have". Expensive body and fancy glass only goes so far. You can use the worlds most expensive camera and still take shitty pictures. You can use a Gameboy Camera and still take good pictures.
That all being said, I think these photos are a great demonstration of "use what you have". It doesn't really matter that it's the new iPhone 21 Pro Max Ultra w/ Quantum Tunneling. You can take amazing photos with a little bit of creativity and a practiced eye. In fact, "limitation breeds creativity" is doubly true with the many limitations of an iPhone camera.