Welcome Valley is a district where new toons start out. Each district has its own version of Welcome Valley containing only Toontown Central and Goofy Speedway. If you're in a different district, and go to Welcome Valley, you cannot go to anywhere other than Toontown Central or Goofy Speedway without being moved to your previous district. Welcome Valley has invasions. Say there was an invasion in Boingyboro and you switched to Welcome Valley from Boingyboro, you would be still playing in Boingyboro since it's the same except no other playgrounds apart from Toontown Central and Goofy Speedway.