Have you tried Padlet yet?

Link: Padlet.com 

• Padlet is a digital canvas to create beautiful projects that are easy to share and collaborate on. It works like a piece of paper or a bulletin board. You start with an empty page - a padlet - and you can put whatever you like on it: a video, an interview, a selfie, text posts, or documents. 
•  Padlet could be used as part of a classroom or library website--multiple padlets could be going at the same time that could include book reviews, recommendations, quotes, fun facts, etc. 
• You could use it to share information or open a project that would be open to public contributions. You could also use it on a screen in the library space to display current information, such as interviews with authors, author features, new books, books available for sale, etc. 
• Cost of the Tool: FREE! Available on the website or as an app.