Good on you for taking your child to experience this. Now, to get you guys out to Topaz Mountain to collect some sparkling topaz, amethyst, opal, apache tears(obsidian) and the king, red beryl!
Fossils are a whole different game, but you guys are in a great area for hunting for those too. Parowan Gap has some awesome dino footprints you can walk up to. Utah is an amazing place.
Good suggestions!