There are events for everyone at the NZ International Science Fair in Dunedin from the 5 July to 13 July. Many of these are free & this is a small selection:
Bug Wars - Information Centre,Dunedin Botanic Gardens.
Bird Talk - Aviary, Upper Botanic Gardens
Find your Inner Fish - Zoology Building, Otago University
Future Food Roadshow - Lower Octagon, Dunedin
Undersea Antartctica - Hutton Theatre, Otago Museum
All of these events mentioned are within walking distance of Sahara Guesthouse, Motel & Deluxe Units.