Van De Grrruff toys

Given to a child as a guardian to protect their room against entry by siblings, (or the boogey man), a stuffed animal, (let's say a lion), houses a small Van De Graff generator in its belly with the metal sphere in its head, and a motion sensor in its mouth.
The sensor activates the generators motor and a few other sound and movement gizmo's, so when someone gets too close, the critters’ upper lip curls, the eyebrows frown, a growl emanates from the hidden speaker and the hackles stand on end from the static electricity.
Anyone not familiar with the toy will surely be frightened out of their wits, but for the staunch few who dare to try and remove the guardian are in for a nasty shock.
Friends of the stuffed animal know that a touch of the grounded "magic wand" will calm the beast. The frown turns upside down, the hackles lower and that growl becomes a purr.
The child can now safely snuggle their pet.