The Solar System to scale

My 7 years old son asks me to do a space video, showing the "real" sizes of the Solar System.

While trying, I realize that it is actually impossible to show the System truly to scale, respecting sizes, distances, and times. That is something I've never realized so far.

I then started to change the video from "making a real size Solar System" to "explaining why it is impossible to make a real size Solar System