Clever Frame® - Portable and Modular Exhibition Systems Clever Frame® is the most innovative portable and modular exhibition system in Europe. Clever Frame® - fully portable, tool-less modular exhibition system that can work for you during different events all year round. Our modular exhibition stands can be used on plenty of events such as: exhibitions, graduate fairs, trade shows, conferences, press releases, welcome stands, point of sales, and many more other events.