I choose to hand sew the hole thing.Seriously I don't why I first choose it but even if I'm not a fan of hand sewing I must admit it offer advantage that machine does not.It's easier to start and stop , and restart again.That's practical when you have kids playing around.
A close-up of the stitches
I used cotton embroidery thread for the assembly doing something decorative in the same time.It did not work well in this type of fabric , it is too soft and extensible but comfortable for the wearer.
The proof it's hand sewing , not equal.Details of the upper sleeve.The blue fabric is partially knit bamboo I had used for another project in the past.Soft , comfortable and perfect for hot summer day.
Don't ask why white on white , just an experiment of sewing on the lower sleeve.
Now this costume have to be wash and will be put in the memory chest of my daughter.It's the first costume I ever made for her entirely hand sew from her mom with all her love.