This pattern is designed for those needing sizes 7-14 and the directions are even easy enough for an older child/early teen to follow. There is only one pattern piece which is great! Don't forget to prewash your fabric before making them. The preferred fabrics to use are a cotton print or flannel.
Here are the flannel frog pants that I made for Lauren. I had to alter the pattern slightly for her as she needed the length of an 8 but not the waist or leg width.