@naidasaavedra, some ideas for perusal:
McPhee’s Draft No. 4 suggests a useful and fun writing exercise, but it’s missing the hidden contextual advice of using older dictionaries like Webster’s 1913 dictionary.
Encouraging creative writers to keep and maintain a commonplace book is always a fruitful exercise. Most of the “greats” had one (or something close to it), but contemporary examples like Eminem’s may be more relevant/motivating. Blogger and creative writer Austin Kleon has a digital version as an example. Colleen Kennedy has an excellent and creative class assignment relating to this as well.
Musician and producer Brian Eno and artist Peter Schmidt created a set of 100+ “creativity cards” which they entitled Oblique Strategies that can be useful to introduce to students and have them use over a semester. All the editions’ cards can be found via links here: http://www.rtqe.net/ObliqueStrategies/Edition1-3.html, but there are also websites, apps, and even printable cards.
And finally, speaking of cards, it can be fun to do experimental creative writing using index cards, a practice used by Vladimir Nabokov, Jean Paul, Arno Schmidt, Michael Ende, and many others. Open Culture has a short piece on Nabokov’s process.
Should you care to mine it for other possible ideas, I’ve got a digital commonplace of my own. Here are some possible places to start:

https://hypothes.is/users/chrisaldrich?q=tag%3A%22creative+writing%22
https://hypothes.is/users/chrisaldrich?q=tag%3A%22writing+advice%22
https://hypothes.is/users/chrisaldrich?q=tag%3Acreativity

References

McPhee, John. “Draft No. 4: Replacing the Words in Boxes.” The New Yorker, April 29, 2013. https://www.newyorker.com/magazine/2013/04/29/draft-no-4.

Somers, James. “You’re Probably Using the Wrong Dictionary.” Blog. The Jsomers.Net Blog, May 18, 2014. https://jsomers.net/blog/dictionary.

Kennedy, Colleen E. “Creating a Commonplace Book (CPB).” Accessed August 31, 2021. https://www.academia.edu/35101285/Creating_a_Commonplace_Book_CPB_.

Eno, Brian, and Peter Schmidt. Oblique Strategies: Over One Hundred Worthwhile Dilemmas. 5th ed. 1975. Reprint, self-published, 2001. https://www.enoshop.co.uk/shop/oblique-strategies.