You’re traveling for business, but your daughter has a soccer game … you could send her a “good luck” message with a soccer ball image to let her know you’re thinking about her
I like this idea for sending messages to a friend/family member’s Tidbyt, as well. Like, if I had a spot in the rotation reserved on their device, where I could send a birthday message/post a photo/etc. Obviously, requires permissions/authorizations, etc. But a nice way to build a community of Tidbyts.