The badges and points are great ways to view one's progress. Is there an application or module that moves Astro along the trail as another means of tracking progress?

In this challenge I am getting this error message: "Challenge Not yet complete... here's what's wrong: 
Could not find a Flavor record with the name 'Classic Lemonade Flavor' and a Price of $2."  But I do have a Flavor record with the name 'Classic Lemonade Flavor' with a price of $2.  I tried logging out and back in to the org and Trailhead.  That didn't work so I restarted the computer.  That didn't work either.  Please help.  Doing this one with my kids and the neighborhood kids and have a lot of little ones really into it.  Thank you!

@AuraEnabled
public static List<Contact> getContacts() {
    return [Select Id, Name, Email, Title, Phone From Contact];
}

I'm receiving the following error: unexpected token: 'List'
 

Could anyone tell me how to add Trailhead Badge on LinkedIn. I missed it when completed the Badge. Is that functionality available now?

How does one add the Salesforce Trailhead Badges (link) on their Linkedin Profile? When I edit my Linkedin profile where do I do this?
Thanks!