Riding the Flowrider is not included in a regular admission to Dreamworld. This attraction costs $5 per 30 minute session, which is shared with up to 15 other people.
During the day the ride operates in bodyboard mode, with occasional scheduled "standing" sessions for pro demos and guests who want to give it a go.
Come back after regular Dreamworld hours to give FlowRider a go in NightRider. For $20 guests can share an hour session with 12 other people. Spectator-only entry is $5.