First of all, this is the cutest thank you of all time. Roo Yori, the K9 Ninja sent this little guy a shirt so he can dress up as an American Ninja Warrior for Halloween.
Which got us thinking about how much we want to see those adorable Ninja costumes!
If you know a kid who plans on dressing up as an American Ninja Warrior for Halloween, share the photo with us! You can post it in the comments here, or tag us on Instagram @ANWNation.