Mouse appeal
I just put my hand on the computer mouse and noticed there's petrified, half-masticated goldfish cracker on it. The kid just can't let go of the mouse. We tell him constantly not to touch it, and yet every three seconds there he is at the computer table, standing on tippy-toe, straining to reach it. Now he's become wary enough of our barrage of "No Henry's!" that he looks out for us while he's doing it, and if he should be so unlucky as to get caught in the act, he gets a wide-eyed look of innocence, clearing trying to convey the fact that an unseen force is currently controlling his body and even though it looks like he's trying to grab the mouse, he's in fact trying very hard not to. He would like you to know that despite his earnest efforts, somehow the unseen force wins every time.