Amigurumi or crocheted toys is a slightly different artwork from other types of crochet. Mostly because it involves 3D rather than 2D projects, which means that the crocheting techniques often involve rounds rather than rows. 

Crocheting involves creating various shapes to achieve different outcomes, 2D shapes like circles can be made into doilies or rectangles made into blankets. As for amigurumi, it often involves creating various 3D shapes, for instance spheres and cylinders instead.