This was a more contained kind of adventure/mystery than the previous books, but my 6-year-old and I enjoyed it either way. The Black Dinosaurs go to space camp, where they participate in simulated space missions and learn a lot about space travel. My son didn't seem to mind the abundance of facts that were shared, although he was very sad about the first dog in space dying (more so than when he learned about the Challenger disaster, actually). As with the previous books, it gave us the opportunity for good discussions, punctuated by Ziggy's antics and other humor.