Not cheap to get in, but worth it. Fantastic views...

Not cheap to get in, but worth it. Fantastic views of Edinburgh from the top of the tower.
The actual camera obscura show is a projection of the city onto a special table using mirrors and lenses at the top of the tower. The guided tour of the city whilst viewing it is interesting.
The other floors of illusions have plenty to entertain kids and adults for a few hours.
If you only have a short visit to Edinburgh, this and the Castle would be the top two places to go.