Refer to the link below for shuttle timings
http://www.aloha.gov.sg/index.php?option=com_content&task=view&id=386&Itemid=772
Also you can choose to take bus 403 from Pasir Ris Interchange to Downtown East and walk in.
Ps: there is a pool.. if u guys wanna go swimming u can bring your swim wear!!4:41 PM