Celine,
you’ve got me hunting for that now – I’ve definitely seen one from https://marsed.asu.edu/stem-lesson-plans
which were made for an earlier Mars mission.
This isn’t it:
https://www.jpl.nasa.gov/edu/teach/activity/mission-to-mars-unit/
There are a few sites that have Little Green Martians – which is https://www.jpl.nasa.gov/edu/teach/activity/looking-for-life/
And I bought all the pencils and two of the magnets from the Tiger in Mahon Point – so go into town to find more!