Nearly a year ago, we wrote about a lovely app called Loopy Lost His Lettuce, whose appeal was partly the way its characters and scenery were all handmade crochet rather than computer graphics.

Now its developer Woolizoo is back with something new: Woolizoo’s Ocean Rescue. And yes, the crochet is returning, just this time in an app about the ocean and its creatures.

Aimed at 2-6 year-olds, it’s a combination of games and educational exercises, with an environmental theme that hopes to teach children about the dangers posed to our oceans and sealife.

Expect dolphins, penguins, turtles, crabs and more – all in glorious woollyvision. The message is worthy, the games are fun, but it’s the handcrafted visuals that we’re still blown away by most.

Woolizoo’s Ocean Rescue costs £1.49 for iPhone and iPad on Apple’s App Store, and £1.18 for Android on the Google Play store.