Here's an idea for creating a food chain on a ribbon. IArrows show flow of energy. Use with Apologia Zoology, Apologia Flying Creatures, Apologia Swimming Creatures, Apologia Land Animals for homeschool science
How to keep a child busy for hours in the summer: DIY: Giant Ice Cube Awesomeness - filled with plastic animals, dinos, and such. And I'm sure you could put in food dye before its frozen to color it like the ice block in the photo.