* Polymer Clay: Small amounts of several pastel colors. Here's the formulas I used to match the colors of the Necco brand candy hearts. (White refers to a 2:1 mix of Premo white and UltraLight; all other colors are by Premo.)
Yellow heart: 1 part Cadmium Yellow; 4 parts white
Orange heart: 1 part Orange; 7 parts white
Green heart: 1 part Green; 7 parts white
Pink heart: 1 part Fuchsia; 1/4 part Cadmium Yellow; 5 parts white
Purple heart: 1 part Purple; 1/2 part UltraMarine Blue; 6 parts white
* Tools: Scissors, needle tool or toothpick, stiff-bristled paintbrush, clay knife
* Color laser printer or color copier
* Rubbing alcohol
* Corn starch or baby powder
* Candy heart (optional)
* Amazing Mold Putty (optional)
Step 1: Make a Candy Heart Mold (Optional)
Allow the mold to set. Once it's ready, press a 1/4 teaspoon ball of clay into the mold. Use a scraper tool or a clay knife to remove excess clay from the back. Pop the heart out and correct any molding flaws.
If you don't want to make a mold, you can easily hand-form the heart based on a real candy heart (or a photo of one).