r/buildingblocks↗
Building Blocks: For LEGO, Mega Bloks, Kre-O, and Others
A place to discuss building blocks of all brands and types. This includes LEGO, Mega Bloks, Kre-O and other brands.
20k subscribers269 posts / mo in Sep 2026183 authors / mosince 2014
r/buildingblocks has 20k members (+60% over the last 12 months). It gets about 269 posts a month from 183 people. Top topics: Lego Controversies, Lego Builds and Lego Sets.
When to post on r/buildingblocks
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How r/buildingblocks has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/buildingblocks
Top topics
Share of the subreddit's posts
- Lego Controversies1.8%
- Lego Builds1.0%
- Lego Sets0.9%
- Lego Vehicles & Builds0.8%
- Lego Sets and Creations0.8%
Brands people mention
Most-mentioned brands and sites, last 12 months
- Lego System
- Rebrickable
- Aliexpress
- BlueBrixx
- TikTok
Everything else about r/buildingblocks
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research