This is a long, weird silence, huh. He watches Seth move from one set of puppets to the next, moving them, signing with their hands?? He doesn't say a single word while this kid puts on this display, only daring to open his mouth when Seth offers an explanation.

A bad explanation but an explanation none the less. "They're possessed...?" he offers cautiously. He's not sure if it's worse if they're possessed, or if they're just plastic and wood and metal. What a weird turn his evening has taken.