Here's an idea for simple cookie decorating for Valentine's Day. Instead of cluttering your home with special cookie cutter shapes, use a simple shape that can be made with a drinking cup!
Use different color dots to make rainbow hued hearts.
Write a simple word or even a love poem.
Use a rainbow of hues to make hearts as well.
A simple, single colored heart.
Or draw the outline of a heart on a solid colored background.
Or draw a solid heart on a solid colored background.