The 100 Themes Challenge is an interesting opportunity to give your imagination a hint. It is about a list of 100 diffrent words and to each one you draw, paint, write, photograph or make a piece of art. Everything what comes to your mind is accepted and there are uncountable diffrent ways to do the challenge.
By now there are many diffrent lists and a few clubs who collect the lists and the art about the challenges. 100ThemeChallenge (https://www.deviantart.com/100themechallenge) and 100ThemesChallenge (https://www.deviantart.com/100themeschallenge) are two of them.
The challenges help to overcome art block and lack of ideas, too.
I always thought it is interesting what the artists here on dA do with the words. One word a