In an exclusive video series filmed at the Chalet of Play, Lewis also showed off a brick-built model of the artwork for his latest album, Survive.
“It’s quite a calming experience building a Lego,” he said.
However, the 29-year-old star said he doesn’t always follow the instructions through to the end.
“In all of my years of building Lego, I don’t think I’ve ever built anything to completion.”
Kuran Sharma, Lego Group head of marketing, said: “We loved taking Lewis on a trip down memory lane through Lego sets and hearing about his cherished memories of the Lego brand.
“The holiday season is the perfect time to rediscover the joy of play, no matter what age. That’s what the Lego Chalet of Play is all about – spreading joy through building your favourite Lego sets, or even channeling your creative imagination through free building.”
The Chalet of Play is a free-entry festive destination open until November 30.
Visitors can explore a Christmas market filled with various creative challenges and festive fun.
And they can also follow the Cataclaws Scavenger Hunt to the Lego Store in Leicester Square to find more magic, interactive zones and festive building activities.