Not bad for a NASA nerd! LOL on your profile description.
What a cute quilt.
Very cute project. I have twin daughters too :)
Hi, Maura! Yes! I have a suggestion for marking on the white. Try a Frixion pen! These are the greatest thing since the invention of the rotary cutter. You can buy them at Staples or online. There were more options, prettier colors, online compared to my Staples. Some quilting stores are now carrying them. They look like a pen, but the minute you touch the fabric with a warm iron, the marks disappear. You can get great, crispy marks on fabric to follow and then, wha-lah, they disappear. I would do a test on the fabric you are using first, but I have not had any trouble so far. Good luck! Beautiful project.