Yes, you can decorate windows with paint

If you add a teaspoon of dish soap to acrylic paint, you can decorate your windows and mirrors for the holidays. Draw big snowmen or other decorations. It will wash right off when you're ready for it to. No greasy smears like the snow in a can leaves.

Child's apron or bib

If your child enjoys painting or other messy, fun things, use a plastic grocery bag as a disposable bib or apron. Cut across the bottom, pop the bag over the child's head with arms through holes--handles up as straps. If straps are too long and bag goes too far down the front of clothing, pull handles up and tie into a knot to make it fit better. Tie a string or piece of yarn around the waist to help hold the bib in place.