This technique is called Paper Piecing and I've learned it from Vanessa Webb. You can find its description here.
Of course you can use this technique with any other stamp, but I think "Loads of Love" set is just perfect for this purpose.
On the attached pictures you can see what I've come with using this technique.
Hope you like it :)
If you have any questions or would like to purchase products to make such cards - let me know gabriela.jandura@gmail.com .
Till next time, Happy Crafting!