Should I keep them hidden?

Let us say you’ve been dating a guy for a while, but you’re not “official” yet. He’s invited you over to watch a movie/have dinner/whatever, just a casual time to hang out.

However, sometime during your visit, you happen to see a box of Legos on his desk. They look like they’ve been played with recently and that the guy was in the middle of building something.

What would your reaction be?