After much experimentation, Heart Pieces are now complete.
They come in two transparent variations (colorless and blue) and can be purchased alone, as a necklace or on a keyring. This is the first time we've casted with acrylic. :D
Glue is used only on the middle red heart to keep the acrylic looking clear, so there may be a bit of movement between the layers. I hope to improve on this once we eventually get to making the Full Heart Containers.