The Muscular System YOUR MISSION: Do you even lift, brah? Flex your muscles (and your brain) with this zany circus-themed activity kit! How many muscles do you have? Maybe building our marionette can help. Gesture drawing helps you understand movement. Don't believe us? Try for yourself! Here's a kernel of wisdom: our circus popcorn recipes are delicious! Dioramas, paper toys, juggling foot bags, face paints and more await! Along with a full-length comic packed with adventure, this incredible activity kit promises endless hours of fun (and learning)!