Sticky Brain or Growing Brain? You do the shopping at the Mutter Museum in Philadelphia

Sticky Brains 

Throw these sticky toy brains against almost anything and they'll stick.
A great gross out toy for your next boy party favor bag,
your next all-nighter study group break. Keep your mind clear, let off some steam. Throw some sticky brains against that dorm room wall... Soft sticky plastic

....Growing Brain: Smart, Smarter, Smartest 
Pack of 10 Watch It Grow BRAIN- Collectible Magic Growing Thing
Perfect for Final Exams Week