On recherche un supplément.
Many sources of inspiration exist for [supplément] adventures. Take almost any action or adventure story from cinema, TV, comics, or novels, add a dash of mad science, mix well, and see what crawls out of the test tube.
Perhaps the most important thing to remember is adventures are usually driven by conflict. Standard literary conflicts include one person versus another, nature, or himself. Having the heroes noodle around building mad inventions at random can be fun for a while but soon grows tiresome unless it leads somewhere more, well, calamitous. For a one-off gag comic strip, there doesn’t need to be any real plot to speak of, but a roleplaying adventure usually needs tangible goals and probably a bad guy.