Build The Mystery creates wooden model kits for adults that combine hands-on building with at-home detective games. Each experience unfolds in three stages: assemble a detailed scene, investigate a case using its documents and clues, then display the finished, illuminated diorama as a collectible. The brand currently offers two mystery models, La Ligne Pourpre and Cabinet de Curiosités, along with a Pack Duo.

Each model takes approximately 10 to 15 hours to build and includes around 300 precut wooden pieces, LED lighting, batteries, tools and step-by-step instructions; glue is not included. Once the scene is complete, players can spend more than two hours solving the mystery, alone or in a group of up to five, using a dossier of over 45 items such as testimonies, correspondence and evidence. Finished models measure about 40 centimetres long.

Build The Mystery sells its products through its online shop. The launch prices are €129 per model and €239 for the Duo Pack.