Treat the kids to an afternoon of educational fun at The Childrens Museum. The grown-ups among you are sure to learn a thing or two as well!
You'll be spoiled for sightseeing choice in Ixelles. The Children's Museum is a great place to kick off here, but there are lots of other worthwhile spots to consider. La Grand Place, Atomium, and NATO Headquarters are near the interactive exhibit for kids and will fill in your day nicely.