This wonderful endocrine gland secretes melatonin, that wonderful substance that controls sleep. So if you want sweet dreams, get this pin to help you slumber. This cute little 1.25" pin comes packed on a card and was 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.