Loopi
Magic Binary Cards
Magic Binary Cards (also known as “Binary Dots”) is a classic activity from CS Unplugged. Using cards with dots (1, 2, 4, 8, 16), children learn how computers represent numbers using only 0s and 1s.
By flipping cards to hide or show dots, children can represent any number from 0 to 31 (with 5 cards). It’s a powerful way to understand base-2 logic without needing a screen.