The Human Body is an app, but it was originally made the old fashioned way, with cut-out paper. Made by studio Tiny Bop, each page is interactive and visually accessible. As described on their site:
Everything, from the bones and brain to cells and veins, is animated by particle physics in this interactive playscape. Children can poke, probe, and examine the skeletal, muscular, nervous, circulatory, respiratory, and digestive systems. Each app contains a recording tool so you and your child can ask questions, listen, and respond to each other.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.