If you are going to use this WebQuest in future lessons, you could present the activity for the students through Google Classroom. You just need to create a task named "The Olympics' Dream", or whatever you think it's appropriate.
You could create a poster yourself to show to students as an example. Trust me. It'll be better for them if you show a hand-made example.
Don't forget to post the link to this webquest.
And to give the students the rubric so they know what you'll be evaluating and they can double-check once the task is done and you provide the feedback or any comments to them.