Steel tower structures engagement

Hi. I am designing a refresher project on identifying (power line) steel structures and their components. The learners will have already covered the content in a previous course.  In my storyboard I have a structure that the learner hover over to identify the different parts of the structure and then some activities where the learner drags and drops labels onto structures, etc. I am looking for other ways to engage the learner. Happy to receive all ideas. Thanks

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Mr C