The beta sign-ups for the upcoming free-to-play PC & Xbox One game, Project Spark, are now open. Project Spark is an open-world digital canvas that enables anyone to build, play and share whatever they can imagine.
To register, check out the official site and sign up. Note that even though sign ups have begun, the game is not available to play at this time, but should be sometime in the future. Check out the trailer for the game below.