This T-Rex will turn its head to watch you as you move. But how?? YouTube illusionist Brusspup shares the secret with this Jerry Andrus-inspired trick. And if you want to try it out yourself, Brusspup made these green, red, and blue dinos available for download. Next: watch more optical illusions, including the rubik’s cube illusion. via @aatishb. This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content. Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.