Interactive Checklist

I am trying to figure out a way to create an interactive checklist. Learners are supposed to click around the room to fulfill what is on their checklist. The checklist is on a separate layer. My goal is once a learner clicks on an object that fulfills something on the checklist, the checklist will automatically check off that goal. 

I have been trying to figure out a way to do this with variables and triggers and haven't been able to.

Any suggestions? Thanks!

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