Most decals indicating that there’s a family on board are boring and of the serious type. If you’re looking for something different, then you might want to get these Star Trek decals instead. They weren’t exactly made for that purpose, but hey, no one’s stopping you if you want to use it that way.
They’re actually sold in sets of 32 decals, where 23 of these are based on characters from Star Trek: The Original Series. Mix and match and throw in some random Tribbles when you feel like it (there are actually five of those included in every set). Each set is priced at $14.99.