Looking at the 4 children's picture books they represent, 3 have been sold to publishers I've never heard of (and I've been heavily involved in kid lit for over 20 yrs) like https://cardinalrulepress.com , http://ink-smith.com. The 4th pic book has been sold to an indie press I have heard of, Clearfork/Sprok but all 4 are open to Author submissions and am almost positive none pay advances.
When I think kid lit Agent, I think publishers like Random House, Harper Collins, S&S, etc. Publishers an un-agented Author can not access and that pay advances to both Authors and Illustrators.