In teaching quantum physics, visualisation is a useful tool to improve students' understanding of phenomena from the quantum realm. A double slit experiment has shown itself to be a good simple enough example where all important quantum concepts such as waveparticle duality, superposition, or measurement meet in a nice way.
Here, we present a simple web-based interactive interface visualising a double slit experiment with electrons. Teachers and students would be able to conduct this experiment by themselves and explore behaviour of quantum objects step-by-step, following a path outlined by Richard Feynman in his famous lectures.