The birthday parties that I've been to where the kids and the parents seemed to have a good time are at Kids-at-Work (Megamall) and in Country Waffles in Eastwood.
If you need help organizing your baby's party, you can contact Parties Unlimited. They're located at the 2/F Lobby, Madison Square, Madison St. cor Ortigas Ave, North Greenhills. Telephone number is 723-9118. You can also email them at firstname.lastname@example.org. They have anything and everything for kiddie parties.