Learning the names with the dinosaurs seems harmless, as long as he also learns that sometimes they change, or were based on an erroneous assumption and the named creature didn't actually exist.
Dinosaur names change or get dropped, only because of more information becoming available. Extant species' names are more settled, but mostly because we have so much more information. I expect that the dinosaur species with the most fossil evidence aren't going to have their names change any time soon, unless some sort of new, general approach to naming sweeps the field leading to rethinking the whole thing.
What should be avoided is unintentionally creating the kind of mind-set that could have a hard time dealing with corrections later on in life.
Worst-case scenario, years later he finds out a favorite dinosaur of his youth was a misnamed individual of a different type, and ends up deciding that scientists are frauds and becomes a young-earth creationist.
Basically, as long as there's understanding that scientists are generally doing the best they can with the available information; that scientists in the early years of a new field may have made more mistakes due to the limited knowledge framework (early misconception of the iguanadon's thumb spike as a nose spike, etc); and that scientific errors made in good faith are a sign of science's strength, because they can be corrected by sufficient contrary evidence.
Dinosaur names change or get dropped, only because of more information becoming available. Extant species' names are more settled, but mostly because we have so much more information. I expect that the dinosaur species with the most fossil evidence aren't going to have their names change any time soon, unless some sort of new, general approach to naming sweeps the field leading to rethinking the whole thing.
What should be avoided is unintentionally creating the kind of mind-set that could have a hard time dealing with corrections later on in life.
Worst-case scenario, years later he finds out a favorite dinosaur of his youth was a misnamed individual of a different type, and ends up deciding that scientists are frauds and becomes a young-earth creationist.
Basically, as long as there's understanding that scientists are generally doing the best they can with the available information; that scientists in the early years of a new field may have made more mistakes due to the limited knowledge framework (early misconception of the iguanadon's thumb spike as a nose spike, etc); and that scientific errors made in good faith are a sign of science's strength, because they can be corrected by sufficient contrary evidence.