A B.C. brother-sister team has built its way to the final rounds of the on American television, with all eyes on the $100,000 grand prize.

LEGO-loving siblings , a Surrey resident, and his sister Emily, who lives in Maple Ridge, have excelled with their tiny-brick builds in this fallsa国际传媒檚 third season of FOX-TVsa国际传媒檚 reality-competition series, also seen on CTV.

David Guedes is a sa国际传媒淟EGO lifersa国际传媒� who successfully auditioned for the Will Arnett-hosted show, then chose his sister as team partner. The show finished shooting in Atlanta last spring, but the siblings are watching it now for the first time. They wonsa国际传媒檛 (and contractually cansa国际传媒檛) say how it all ends Dec. 14 in a double-episode season finale.

sa国际传媒淒oing reality TV was completely new for me,sa国际传媒� David said. sa国际传媒淚sa国际传媒檝e spent a lot of time building LEGO over the years, but never on camera.sa国际传媒�

In this weeksa国际传媒檚 episode, to air Wednesday (Dec. 7), the Guedes are among four teams left in the competition. The pairs split into teams to build a race car. In a 10-lap race, the winning team will be safe from elimination and guaranteed a spot in the semi-finals.

In the sa国际传媒渇inal four,sa国际传媒� the Guedes team is up against Calgary firefighters Stephen Joo and Stephen Cassley, an sa国际传媒渋nfluencerssa国际传媒� duo of Nick Della Mora (Toronto) and Stacey Roy (Kelowna), and the American Tull brothers.

sa国际传媒� RELATED: .

So far, the challenges have included creating a LEGO bull-riding character to mount an actual mechanical bull, a sa国际传媒淕uardians of the Galaxysa国际传媒� build, a LEGO tree house with real trees, and more.

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Both in their mid-30s, the Guedes siblings had a lot of fun filming sa国际传媒淟EGO Masterssa国际传媒� and also watching the episodes on TV over the past couple of months.

sa国际传媒淔ilming the show was so much fun,sa国际传媒� David said, sa国际传媒渂ut Isa国际传媒檓 really enjoying watching it now. Despite knowing what happened when we were there on set, you donsa国际传媒檛 know how itsa国际传媒檚 going to be portrayed on television and what happened with the other teams. When we were there we were so focused on what we were building, we didnsa国际传媒檛 see what everyone else was building.

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David, known as Lettuce in the LEGO world, has been building with the bricks all his life, sa国际传媒渢hough he had a sa国际传媒榙im agesa国际传媒� in his teens, and didnsa国际传媒檛 buy any new sets for six years,sa国际传媒� .

In recent years hesa国际传媒檚 displayed LEGO creations at conventions, and lives in the Clayton area with his wife, two sons, a dog and a couple million little plastic bricks. .

David recalls a childhood in Maple Ridge with lots of LEGO around, starting with a big bucket of hand-me-down bricks when Emily was a baby. Now she works as a hospital unit clerk, and hesa国际传媒檚 a .

sa国际传媒淪hesa国际传媒檚 a great teammate,sa国际传媒� David said. sa国际传媒淲e get along better than anyone else.sa国际传媒�

This season of LEGO Masters started Sept. 21 with 24 contestants competing in pairs, with a sa国际传媒淗oliday Bricktacularsa国际传媒� special to air Dec. 19-21, days after the Dec. 14 season finale.

First, the semi-finalists have 10 hours to build a fountain that uses water. Then the three remaining teams have 24 hours to build their best creation possible. In a final twist, theysa国际传媒檙e given gift bags with the first sets they built as kids, to celebrate 90 years of LEGO. .

Next up for the Guedes siblings is a .

sa国际传媒淚sa国际传媒檒l display there as well as Emily and some others from the show,sa国际传媒� David reported. sa国际传媒淲e get together any chance we get, at conventions all over the place.sa国际传媒�

- with files from Neil Corbett, Black Press Media