Here's a link to a funny and pretty clever animation suitable for children of all ages. This came via Treehugger, a holiday greeting of sorts from a website that is always worth visiting. The patience and ingenuity and technology to do things like this have always been intriguing, but not knowing or understanding how things are done is part of the magic.
Sixty-four years later: How Watson and Crick did it
21 hours ago in The Curious Wavefunction