since my childhood is astronomy my hobby. Last year I worked on system for generation paper sky maps (sky maps in PDF format that can be then printed). Achieved result you can see here (http://www.josefpirkl.com/stellaversum_maps.php). All maps are free for download, I am working on it in my free time.
In current version (generated Release 3) is possible to download several types of map, one (colored) is addressed especially for children, another types are more and more detailed.
For working on next releases should be good for me some supporting, it enables to make development of the the Generator for next years.
Thanks very much for interest.