Free
Ages 8-up
Ready to be dazzled by some out-of-this-world ideas? This is the free, teaser version of Solar Walk (CTR July 2010) which lets you zoom in on just one of the nine planets -- the rest are offered as an in-app sale. You can travel between Saturn and its moons (Mimas, Enceladus, Tethys and Dione) and speed up or slow down time with a simple swipe. The view is amazing.
Need to know: This app teases you with content that you can see, but you need to pay to play with. Still, it's free, and you can get the entire solar system for an additional $.99.
Ease of use: 8/10
Educational: 10/10
Entertaining: N/10
$1.99
Ages 2-7
Jigsaw puzzle apps abound. But few are as beautiful or as fun to play as this one. Designed in Romania, the colorful app contains 13 shape/color/sound puzzles that were inspired by stacking toys of the variety you'd find on a shelf in a preschool. Each part is shown in 3D, and they give a satisfying "snap" when they pop into place.
Need to know: There's plenty of room for trial and error ... mistakes simply drop to the bottom of the screen, which makes experimenting fun.
You can toggle the background music or sounds, and there's a nice challenge range.
Ease of use: 10/10
Educational: 10/10
Entertaining: 9/10