I dunno if this counts as a fan mode, but you can use Lego pieces

My 1st toy photo was a souvenir from Copenhagen - Stuck In Plastic

LEGO IDEAS - Blog - Fan Vote Closed and Top 30 Revealed! - Celebrating 15 years of LEGO Ideas

Review: 41703-1 - Friendship Tree House

Batman™ Badge Reel Made With LEGO® Minifigure™ Pediatric ID Badge Holder Superhero

Mobile Frame Zero: Rapid Attack – The Indie Tabletop Wargame of Tiny Giant LEGO® Robots!

LEGO Ideas Motorized Lighthouse (21335) Officially Announced - The Brick Fan

Monday Musings #4: What type of LEGO fan are you? - Jay's Brick Blog

Determining the sets you have in a box of random parts

LEGO Marvel Avengers Tower (76269) Officially Announced - The Brick Fan

Monday Musings #5: LEGO Leaks ruins the fan experience - Jay's Brick Blog

Review: 60349-1 - Lunar Space Station

Review: 42144-1 - Material Handler