Egg 'n' toast. This a great way to get children to eat breakfast. A heart cookie cutter, a slice of bread, a dab of butter in a skillet, assemble in the skillet, turn once and voila. You can let this cook to your desired doneness.
Here's a post with an annotated list of books and web sites for studying shadows. Also, this picture gives me an idea for a fun photo op for our unit. The kids could hold up signs to make the words Rosalind Franklin STEM Elementary and or their own names