The pattern was based on this and this, but I shortened the sleeves and added an elastic edge to give the sleeve a little poof.
As with the other versions, I'm left thinking I could do something more with this pattern. Although I'm all for simple, there is something lacking (despite the overstimulating print). If I can pry it from the four year old's hands long enough to figure it out, I'll let you know. For now, hope this brightens your day a bit!