I made this way back when I was about 14 years old. (stone age)
I would love to learn how to make this a gsd file! ;)
Place a copy of the design on your paper, I use paperclips to hold it in its place. Use a cutting mat to save your table ;).
Cut al the big lines.
make mountain folds on the striped lines and valley folds on the dots.
place a background paper and send your birthdaywishes!
I had succes with this card, hope you will too!