We stopped by the Osmo booth, where they were showing off their platform for developers working on interactive learning games for children ages 5-12 years old.
With the tagline, "play beyond the screen", the Osmo system works with iPhones and iPads to bring "hands-on" play to children. Using physical items, children can play a game and interact or see results on the device.
In their demo we drew some simple lines on the whiteboard, and they are brought into the game.
Other examples might be pieces that are put together to program movement, as shown in this product image:
Learn more about Osmo at https://www.playosmo.com.