Create project walls inside the company in a plce where most of your employees are lickely to go. have project expose the latest prototype of what they are building, and constantly refresh it. Project shall expose the rationals behinf their key design decisions. Any employee can, view and comment, expose ideas and suggestions and so cocreate

Therfore, you create a situation of transparency on what is beeing done, project do not belong to a single team but to the whole company giving each employee an opportunity to participate, and a better sense of a common adventure to engage employees. This project wall is also a way for project team members to explain their choices and so, educate in an informal way others about what they do.