The phrase "interesting experiment" refers to a situation where something new or different is being tried out, and it catches people's attention or curiosity. Full definition
It has provided for many interesting experiments in various realms as well. (game-designschools.com)
«Clearly, there are some very interesting experiments suggested,» he says. (sciencemag.org)
It's only when you know lots of things, and possess different skills, that you can decide which is the most interesting experiment for your project, with real practical application. (sciencemag.org)