Book with cards and plastic box

A while ago the supermarket we went to was giving animal cards for every 5 or 10 euros of shopping, I kept them to learn the animals in Dutch! 

Now that I see that my daughter just loves them as well as books I combined the 2 things together (just in time for international children's book day :p):

I took the label out with steam (although I used another packaging that was smaller and fitted better in the end).

I used the hole puncher do make holes in the cards.

I passed the thread into the cards and box's holes and firmly tied a knot, so my daughter doesn't take it out, but with enough space to be able to open the box and turn the cards.

That's all folks! ;) Very simple project, you know how kids love the simplest things!