This is the place to see Malaysian river prawns happily getting fat in Wairakei's geothermally heated prawn farm. Interesting 30-minute tours operate hourly between 11am and 4pm. You can feed the prawns by hand, then end your visit at the Prawn Works Bar 'n' Grill, where you can eat the ones that grew the fattest. It's a lovely setting overlooking the Waikato River. You can also jet-boat from here. The restaurant has a special kids' menu and play areas; for an extra charge, you can play Killer Prawn Golf after eating.