Braunfield, SamuelLaskowski, Michael C.We show that if a countable structure M in a finite relational language is not cellular, then there is an age-preserving N⊇M such that 2ℵ0 many structures are bi-embeddable with N. The proof proceeds by a case division based on mutual algebraicity.en-USsiblingscellularmutually algebraicbi-embeddableArticle