I have been making a few Tri-Shutter cards recently as I find them fascinating. I first saw the idea on this blog
here and adapted the design through trial and error to make a DL sized card from a sheet of A4 card.
This is a card I made for a Baby Boy, I decided that with an extra surface to play with I would add a little pocket with a tag in where you can add the baby's name or even a small photo. The technique is the same as the one of the blog above, but my measurements along the long edge of the card are at 49mm, 99mm, 198mm and 247mm. The 2 cut lines are 4cm in from each edge between the 49mm and 247mm measurements. I think you get a slightly better finished card if you only score 4 cm in on the 49mm and 247mm measurements, especially as you don't need the scoring across the middle part for that bit. They are quite fiddly to start with and I had quite a few failed attempts before I got it right!
The pram on the front of the card is cut from a circle of plain card, I then cut a little over a quarter of it away and then used various border punches to make the trims on it. A couple of buttons for the wheels and some wire for the handle and it was done!

One last card to share, a card for a little girl's 2nd birthday. I hand cut the cake from different cards and based it on the cute backing paper from K & Co.

Have a great weekend whatever you're up to!