After joining the Autodesk family, Tinkercad has been in line to become part of the 123D family of free apps, which, for convenience reasons share a single Autodesk sign-on experience. The key benefit is being able to have one account for all of your various Autodesk products, sites, etc.
Additionally, Tinkercad is now open to all ages! One of the reasons we made these changes was to allow access to Tinkercad for any user, regardless of their age:
For our younger users, you can create your very own account and have the adult in your life approve your access.
For all the TinkerTeachers out there, that means you can now use it with your younger students!