Designing interactive content for mathematics exhibitions is a challenging task. Multiple aspects ranging from educational value via mathematical correctness to performance issues and user interface design have to be taken into account. The talk will illustrate the complete path from an idea of an exhibit to a fully functional interactive implementation in various scenarios. Special emphasis will be laid on aspects of user interaction and on high level implementation possibilities. Scenarios will be taken from interactive exhibits in big museums, teacher training courses, interactive web pages and apps. Mathematical topics will include swarm simulation, 3D polyhedral geometry, connections of art and science, as well as hybrid scenarios where virtual and real world meet. The talk will contain many life demos in the framework Cinderella/CindyJS and (at least partially) demonstrate the full workflow of designing an interactive exhibit.