Friday 11 November is Takeover Day in museums across the country - the day on which young people are given a meaningful role in museums, galleries, heritage sites and historic homes.
We're asking our youth panel to both take over our social media accounts and create a treasure hunt trail through the museum. They'll be tweeting and facebooking about what they find, and setting some clues for you to solve.
Once the trail is complete, we'll put it on our website for you to download and complete during a visit.
Also, if you’re visiting the Museum on Friday, you might like to get involved with Museum 140’s Museum Exposure Day by taking photographs during your visit and uploading to Flickr. We'll be taking some pictures, and we'll show some of the best shots of the Horniman here on our blog.