You know that thing when you see a certain Daniel Radcliffe so often that you don't realize how much that Daniel Radcliffe has been growing and changing over time? It's a universal experience relevant to all Daniel Radcliffes. But watching this video of the actor's screen test for Harry Potter when he was an (approximately) 11-year-old kid will remind you how far he's come. You can even see him test out The Boy Who Lived's iconic glasses, possibly for the first time.
"That's a dragon egg! That's what that is!" Classic cute kid stuff. But the casting director doesn't seem to know that Sirius Black isn't the traitor who betrayed Harry's parents. What an idiot.