Jacinda from Pretty Prudent (that’s the new name for Prudent Baby) shares a free pattern for making a summer MuuMuu for little girls. Elastic at the neck makes it easy for kids to put on or take off. The pattern should fit most kids ages 3-6. If you need a different size, the pattern is just two pieces so it should be fairly easy to adjust. Get the pattern and tutorial at Prudent Baby.