Interactive Minds: Solar System is an iPad app designed to help students learn about the size of the solar system and to help learn a little history of space exploration.
There is a free version and a paid version of Interactive Minds: Solar System. The free version contain seventeen pages of basic information about the solar system. One of the highlights of the free version is an interactive comparison of the size of planets and moons in our solar system. Students can select the planets and moons that they want to compare. Students can also compare the size of the planets and the moons to the sun. Another nice feature of the app is the embedded video clips of both simulations and real footage from space.
The paid version of Interactive Minds: Solar System contains forty pages of information. Included in those pages are additional simulations and more in-depth information about the topics of gravity, dwarf planets, and planetary seasons. Both apps are suitable for elementary school. They’re probably too basic for students older than about eleven or so. I recommend trying the free version of the app before buying the full version.