Flippy the Train vs YARDMASTER 3D

Build a train track to solve digital circuitry puzzles! Flippy the Train rides the rails, flipping switches to model basic digital circuitry: NOT, AND, and OR logic gates. After building these basics, reuse them in larger tracks to create the more-complex XOR gate and half-adder. What is the fewest number of track segments required to build a half-adder? Includes a sandbox mode for creating arbitrary track for Flippy to ride.

Take charge of the railway yard. Plan your route, line up the switches and assemble each train in the correct order. YARDMASTER 3D is a railway shunting puzzle for iPhone and iPad. Move carefully, couple at low speed and leave the right wagons on the right tracks. • 18 assignments across six stations • Three locomotives and ten wagon types • Larger yards with three switches and four terminal roads • Clear work orders with numbered steps and completion checklists • Planning mode, directional controls, brakes, coupling and uncoupling • Orbit, follow and overhead camera views • Local records and three-star scoring • English, Bulgarian, German and Spanish Play offline. No account, advertisements or in-app purchases are required. Progress and preferences are stored on your device. Start with Training to learn the controls, then choose an assignment from Operations. Every move matters.