Here's the excerpt from Michelle's blog HERE explaining the challenge:
"For this photography challenge, I'd like you to seek out shadows and silhouettes in your environment. Feel free to create them. Objects positioned objects in front of different light sources can create stunning effects, or try colored transparent items. Or, even go au naturale and find shadows that nature has created for you. Either way, I cannot wait to see what you capture!"
Shadows in the bath
OK so not award winning but fun nonetheless.