This card is fun and easy to make. I made one last week for my Dad’s birthday, but I think it would make a great birthday card for a kid because it’s fun to play with.
1. Start with three cards. Any size will do, but these are quite small–about 5cm x 7.5cm. (For these cards you will need to use card stock or some other thick, heavy paper.)
2. Cut out a long strip of paper in a different color. This strip should be the same height as the three cards and a little bit more than 5 times the length.
3. Fold the strip of paper into an accordion with five panels. Each of the panels should be just a teeny bit wider than the cards.
4. Make three horizontal cuts through the middle three panels of the accordion. Don’t cut the front and back panels.
3. Weave in the three cards.
5. Now you can experiment with all of the ways you can open and shape the card.
6. Decorate!
Have fun making your card. Let me know how it goes 
Very nice indeed. BTW, I think I found the alphabet stamps you’re using on etsy in a japanese shop. I hope you don’t mind
this is beautiful, thank you for sharing your instructions!