Heavy good, light bad

As a kid, I learned a number of "rules" about the contents of presents. Chief among them was the rule that a lightweight present rarely contained anything that I wanted. Usually, it was a button-down shirt, or worse, socks. (Strangely, I'm totally fine with those presents now.)

The following video, showing Isaac casually casting aside an obviously lightweight present, strongly suggests that the "rule of the lightweight present" may be passed on in utero.