Toddler Friendly Brunch place in Manhattan?
Kid friendly brunch: Big Daddy's Diner, Landmarc, Sarabeth's, Penelope, Ouest, Bubby's, Isabella's, EJ's Luncheonette, Balthazar, Petite Abeille, and City Bakery are all reportedly kid friendly from various CH threads I've read.
As always, check hours before you go, and with NYC brunch, earlier is usually better. Note that weekend brunch is a HUGE deal in NYC and there will be quite a wait, especially after 10am at a lot of these places. Also, not every place serves breakfast on weekdays, so check hours in advance (I would call as web sites tend to be out of date) if you want to dine on a weekday.
See also Best Brunch in NY:
I asked a similar question here last summer for brunch with a 4-year-old and twin 2-year-olds...suggestions I recall but didn't try were Bubby's and Norma's. We ended up having one brunch at Sarabeth's UWS (which was full of little kids) and one at Balthazar (we didn't go there specifically because we thought it would be kid-friendly but it was not bad...apart from the sugar container that got shoved off the table when we weren't looking). The food was fantastic at both places.