How to get discount for Singapore Zoo?

You can enjoy free admission to Zoo on the day of your birthday, 10% off retail and F&B Complimentary ice-cream. http://www.zoo.com.sg/visitor-info/birthday-special.html You can get 30% discount if purchase tickets online in advance. http://www.zoo.com.sg/visitor-info/singapore-zoo-tickets.html If you are a frequent visitor to Zoo, it is recommended that you sign up Zoo membership, it costs about $90-$230 depends on how many family members. http://members.wrs.com.sg/beAMemberFOZ.html