Where can i buy cheap deco stuff for kids' birthday parties?

You can check out kidzpartystore. http://www.kidzpartystore.com/licensed-themed-party-supplies-c-3.html?gclid=CMWak6HqocwCFdUSaAodeUAMcw&infoBox=0 They've also got retail stores at ponggol waterway point or westgate mall.