Teachers and librarians, like their students, need hands-on experience with tools and with playing to learn as that helps them build creative confidence. (https://www.edutopia.org/blog/crafting-professional-development-maker-educators-colleen-graves)
Teachers, during PD, should be provided with time, resources, and materials with which to play. It sets the expectation that they will be active agents of their own learning. It gives them the message it is okay to play and experiment with the materials; that tinkering is often needed as a part of learning new skills.