Bondic is a liquid plastic welder that can be used to bond, fill in, or even build plastic, metal, and wood parts. Repair everything from toys to eyeglasses to jewelry. - I think it's a sonic screwdriver
Well now here's a neat idea-- Magnetic vent covers. Place over vents in unused rooms to send heat where its needed. More effective than closing vents! Reusable magnetic vinyl covers wont scratch and can be easily trimmed to fit.