Inside of fossil egg that has mineralized.
Here is a model on display of what a baby dinosaur might look like.
Fossils were on display at Children's Museum of Indianapolis Dinosphere exhibit as of July 2015. They are on loan from John and Jack Hankla.
The museum was founded in 1925 and consists of an approximate 44,000 square meter facility on a 29 acre area site. Their natural science collection contains more than 10,000 items. Some of the items in the collection are the dinosaur Dracorex hogwartsia, fossil of teenage T.rex, Christensen Mastodon, 3.5-4 billion year old Acasta Gneiss, and the Geisler geological collection. Learn more at this link.