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Inventions and gadgets from yesteryear, which sparked the development of modern technology, have been fascinating young and old alike.
The Retro-Lab was ''an opportunity to play with some old-school gadgets; the sort of stuff we thought was so out there and innovative back in the day'', Dunedin Public Libraries marketing co-ordinator Kay Mercer said.
''Amazingly, 90% of these things you can do on your smartphone now.''
One of the most popular exhibits was a cassette recorder.
''The parents have been enjoying showing their kids how these old inventions work.''
Others include 33rpm and 45rpm vinyl records, a Walkman, slide viewers and box Brownie cameras.
The Retro-Lab will appear in the Dunedin Public Library today, Port Chalmers and Waikouaiti libraries tomorrow and Blueskin Bay Library on Friday.