Lucky Wang is a fantastic kids label based out of New York City, with stores in both Union Square and Chelsea.  In addition to pants, kimono inspired onsies and gorgeous dresses, they have a fabulous range of kids t-shirts for around $30.

Check out these fun designs:

The Orange Koi:

The Red Dragon:

Look wise with the Purple Owl:

The Red Cat (does this come in my size??):

Or the Brown Cow:

You can see the full range at www.luckywang.com