LEGO Ideas Hidden Secrets Challenge: Submit Your Build Before July Ends

The LEGO Ideas Hidden Secrets Challenge is running through July 2026, and the brief is simple: build something with a surprise concealed inside it. Community builders have until the end of the month to submit or edit their entries.

From there, moderators shortlist up to 15 finalists by scoring each build across four categories - coolness and originality, inspired details, relevance to the theme, and best use of LEGO elements. Public voting follows on August 11th.

Actually, the hidden element requirement makes this a more quite something brief than most open challenges. It moves builders away from straight display pieces toward something with a second layer - a building with a secret room, a tree hollow with something lurking inside, a piece of furniture that opens to reveal a miniature scene.

That kind of constraint tends to produce more inventive results than a wide-open prompt.

Submissions are still open if you fancy having a go, and the entries page is worth a browse even if competitive building isn't your thing. The standard of fan creations on Ideas challenges is consistently high, and this theme in particular should draw out some genuinely creative work from the community.

https://ideas.lego.com/challenges/824ce17f-5cd7-4792-b0c7-38c61584c805?tab=info