Andrea Brown Literary Agency is one of the best agencies representing children's books, so if you're on the agent hunt I'm sure you've heard of them and Jennifer Laughran. She's all over the internet so there's lots of information to help you decide whether or not she might be the right agent for you.
Jennifer has an outstanding blog with lots of great advice and where she sometimes answers questions from writers; Jennifer Represents.
You can find her on Twitter where she hangs out a lot, so if you're not on Twitter consider giving it a try! She also has a Facebook page where she talks about clients and writing and such.
This is a really helpful link for picture book writers: Jennifer did a guest post of her list of favorite picture books on Sergio Ruzzier's blog.
There's an interview with her about how to get your children's book published at The Book Doctors.
I found an interesting quote from Jennifer on an Absolute Write Forum page. You have to scroll about half way down to see it and I can't link directly to it so I'll post it here, "...But yeah, it is hard to sell picture books. Not "nearly impossible", just hard. It is probably even harder to get an AGENT if you are a debut author with only picture books. It would probably be a good idea to "diversify your portfolio." <--Yup, bad news, but we picture book writers know it's tough already, don't we!
Andrea Brown Literary Agency has a great website with a How to Submit page. Be sure to read the tips and submission advice pages too. You can find Jennifer Laughran on their Agent bio page. Scroll down to find her.
Jennifer Laughran represents:
and Daniel Pinkwater