Hey, I am having a project in Physics, and the project is about interference in Waves. We got a task, and I need to demonstrate how waves interfere with eachother. I got a demonstration with Lasers, how they split up, but I also need a much more simple demonstration. Something like when two water waves hit eachother. I have been thinking of having a bowl of water, and then makes wave in it, but you can barely see the waves. So, do anyone know how to make a good homemade demonstration of waves? Must be something as thick that you can see it easily, as water is to thin. I have basic school lab equipment available, as well as householding equipement. Thx in advance!