Builder Chris Knight had his passion for the toy bricks rekindled a year ago and has been happily building since.
His "five-digit" brick collection now fills his house in Invercargill.
"I always have been interested in Lego but my parents couldn't afford it - I probably have more than 10,000 bricks here."
He was taken with the colourful building blocks at a Lego show last year.
Mr Knight was accompanying his 14-year-old son and decided to join him in his hobby.
They spent hours building creations and planning projects.
"We spent Easter doing that. It is also a good way to bond."
Mr Knight was far from being the only adult with a passion for Lego.
The plastic brick has a legion of Southland fans who will gather at ILT stadium in Invercargill tomorrow at The Southland Brick Show.
Event organiser Gavin Evans said he was expecting 5000 people and more than 50 exhibitors at the event.
"This is two times more than we ever had."
Mayor Sir Tim Shadbolt, MP Sarah Dowie, councillors Alex Crackett, Darren Ludlow and Rebecca Amundsen, among others would also take part in a Lego challenge.
Their creations would be judged by the public.
"It will be the biggest Lego show the South Island has ever hosted."
