Purchase onsies ....3 0-3 mo, 3 3-6 mo, 3 6-9 mo, and 3 9-12 mo. Iron on the fabric interfacing and cut out the circles (I used 3 1/2 inch circles). Once they were cut out, I ironed them on the onsies. Then, cut out all the months of the year with Silouette's Smooth Heat Transfer. Ironed them on and rolled them up. That was it! I purchased the suitcase thru Shop Sweet Lulu.