Like cooking food, our ingredients for creating open resources often come from different sources.
Use the Creative Commons Search or any other similar tool find two or more openly licensed resources that you would like combine in your work selecting both different media types (images, video, audio, text, web sites) but also are shared under different licenses.
Check the resources for license compatibility and describe how far you can reuse and remix them together in your work context (for example how would you localize the context, illustrate or simplify them etc.). Link to a created OER remix or compilation.
Example for "Making Something Better from Existing Open Components":