This one is for Measurement and planting seeds - Jack and the Beanstalk. You could write messages and sign them from different characters/animals to fit your weekly theme/story.Brown Bear, Pete the Cat, Little Quack, Goldilocks, etc.
The Bread In A Bag Digestive System Demonstration. Your students will see what digestion looks like and will never forget - plus they get all grossed out. It's a great activity to do if your studying digestion. There's also the (digestion in mouth)