In ChooChoo Toys, there is a Jak and Daxter board game on the shelf, as well as an Uncharted board game.
In Chapter 5: Pittsburgh, once you meet the brothers, the right bedroom has Jak and Daxter figurines on the dresser. A figurine of Nathan Drake, from Uncharted, sits on the bottom bunk.
One of the newspaper ads you can find is for "Uncharted 12," with Justin Bieber as the star.
Were is the science building