What other play houses could you recommend for toddlers within Metro Manila? Aside from Kidzania, Kidzoona, Active Fun, City of Dreams?

This isn't a playhouse but you may want to consider Manila Ocean Park and Yexel's Toy Museum. I've been to Ocean Park and I can say it's a good place for kids to wander, but I can't say much about Yexel's because I haven't been there. You may read about it here: http://www.wheninmanila.com/yexel-toy-museum-at-manila-ocean-park-with-top-cosplayers-alodia-and-myrtle/