This chapter explores the transformative potential of museums by applying agential ontologies, particularly new materialism and Indigenous (Sámi) knowledge, as analytical lenses. Engaging with these perspectives allows us to come closer to the perspective of the child, and thus, rethink and reimagine museums as radically relational, worldcaring spaces that transcend age-based divisions and extend into caring intergenerational entanglements with the more-than-human world. Worldcare unifies Indigenous and new materialist understandings of an entangled world organically obligated to maintain, continue, and repair the complex life-sustaining webs in which we more-than-humans live. The standpoint of worldcare challenges age-segregated practices and consumer-driven discourses. It proposes that museums are dynamic spaces for collaborative meaning-making, care, sustainable community building and shared responsibility in co-creating the future and safeguarding each other’s existence. Seen through the lens of worldcare, museums are not mere repositories of heritage but enablers of socioecological transformation in alliance with sustainable early childhood education and care.