Have you heard of Oliver+S? They have some cute patterns (most of them are girl but their boy ones a very versatile and cute too!). Anyways their Bedtime story pajamas is one of their best sellers, unfortunately it is now out of print.

http://www.oliverands.com/images/product/model/OS008BT1.jpgOliver + S Bedtime Story Pajamas

But I have some good news! If you would like to make them and do not have a pattern you can make a mock one for...FREE! (except for the fabric of course ;)

Go to habitual and get her free kimono pattern and then use Mades pants tutorial
for the bottoms and voila! You have your very own kimono/bedtime story pajamas! And it only cost you the fabric!