Do you know if there are any play areas for toddlers/kids in Greenhills?

Yep, I saw one at Shoppesville before named Kid's Workshop, although personally I haven't tried to take my baby to a play area. It looks pretty nice and decent for a play area, and your kid might surely enjoy the place. Check this link for a review about Kid's Workshop :) http://www.rinasrainbow.net/2014/09/play-place-in-greenhills-why-kids.html?m=1

we would go to Rob Magnolia for gymboree