Hello Cydra, Brussels is a great place to bring up dc.
I can't offer advice about Ixelles I'm afraid (I'm sure others will be along soon to offer tips, if not now, when they are back from holidays end Aug/beginning Sept) but perhaps as a start have a look at this thread particularly third post from the end about why Ixelles is perhaps not the most family friendly area in which to look.
There are lots of recent threads under Living Overseas offering advice/tips if you have a further trawl!
We will be relocating from Italy to Bruxelles. Husband is already there working and looking for a place to live. We had a look at flats in the ixelle area. having 2 girls aged 4 and 1, we also need to look at schools and nursery as im intending to go to work as soon as possible. I was wondering if there are anyone else living in this area or near by and is this a good area??