Fun Skirts!

My girls LOVE skirts! Year after year I have bought them skirts from Gymboree BUT this year I started making them fun skirts. This is the first of many (I hope). I prefer for them to wear biker shorts of some sort underneath so that when they are getting silly their panties aren't exposed. That will be a sewing mission for another day (the biker shorts). So, since I do not know how to make a skort I am thinking about adding muslin to this skirt as a second (inside) layer. What do you think?
This fabric is so cute. Perfect for the project that needs some color without too much going on.

I am not sure what the girls were doing in this one. They make up poses when I am taking photos. Who knows?