Peek inside houses and see what goes on inside the red walls. This French app (which includes an English option) is based on a print book that comes with a red filtering viewer. If you have one from a secret code activity or if you have some other transparent red object you can use that with the app but even if you have none of these, the app includes a red transparent circle on the screen that you can move over the picture to reveal the animated blue line drawings within. What bizarre things are going on behind closed doors and inside red vehicles? Once you’ve explored all of the areas in the app, there’s also the option to draw your own secret picture inside a house! Unique gameplay simple enough for very young users to navigate and intriguing enough to entertain older users. Note: there is some nudity in the form of a male statue in a museum.