What about having a nice walk in the Sonian Wood on those grey and misty winter days?
What about two?
Red Cloister (Rouge-Cloître)
A mysterious and romantic atmosphere reigns on the park and ponds surrounding this former monastery in the winter, as the last colors of dead autumn contrast with the cold whiteness of the sky (and it obviously releases your poetic talents).
You can check out the calendar of exhibitions from its art center or other cultural activities (lots are foreseen for children, like the performances organized by la Maison du Conte), but a peaceful walk in the domain is more than fine.
Don’t forget to stop at the huge boat-playground behind the Abbey (they won’t, anyway)!
Try and take the path going up to the woods in front of the cloister wherefrom you can get a great panorama. I recommend you however to use your best buggy (which doesn’t fit in my Mini…) if you want to extend your walk trough the forest…
Bois de la Cambre (Ter Kamerenbos)
Even if the Bois de la Cambre is all Brussels’s favorite spot to enjoy the summer, lying on its grass with friends or kids or friends and kids…, a walk around the pond on a winter day has a peculiar charm, especially for children slightly obsessed with ducks and boats (please, tell me mine is not the only crazy toddler hammering home those words aaaaall the time).
Of course you need to finish the afternoon with a little boat trip to the Robinson island and warm up with the delicious waffles of its preppy Châlet.
NB : The restaurant has lots of high chairs, and a kids menu, but unfortunately no changing place for babies.
So, still thinking about hibernating?