Boulevard cafe on baggot st, opp the tesco store is lovely, had my dd in there recently with no probs…on the downside, it is tiny and it is always v busy from aout 12 – 2 so best avoided at those times.
On a more restaurant level, Dobbins off merrion sq is very goos also, no probs with childrens meals and they dont rush you out…they have a v reasonable lunch menu too if you fancy a treat !
Have also heard good reports about fallon and byrne offwicklow st, have never been to the restauraunt myself….ooh and the Avoca cafe at the bottom of grafton st is fab too..