Take your thyroid everywhere you go with this amazing keychain. Whether you're a couch potato or a marathon runner, the thyroid tells the body how fast to go. This gland serves as the body's thermostat, deciding how much energy to burn, and also how energetic you feel. It's metabolism central, baby. Enamel keychain measures 2.25" x 2", engraved with "Let's Metabolize" on the back. Cardboard backing describes the inner life of this essential endocrine pal. Designed in the U.S., made in China. I Heart Guts happy organs put a smile on your face and smarts in your brain! Our adorable organs make the perfect gift for everything from a broken heart to a tummy ache. Get your feet wet in anatomy or bone up on your physiology with our nerdy plush toys! I Heart Guts is the brainchild of an anatomically obsessed illustrator who loves internal organs and all they do. Founded in 2005, our bare-bones family operation strives to offer plush organs with love, style and geeky puns. I Heart Guts plush organs were named Best of Toy Fair by Popular Science magazine in 2014.