Great for paper crafts, 3D stickers add extra pizzazz because of their thicker, often puffed up style. This works particularly well with butterfly, flower and heart motifs.
Children's stickers also often come as 3D types simply because they are more visually interesting. Most 3D stickers are made of moulded plastic and often include very bright colours and engaging patterns. Try experimenting with 3D stickers in your card making to see how it adds extra dimension to your creativity.