This simple object permanence and early logic material presents a single wooden cup that separates into two, inviting the child to explore part-to-whole relationships through direct manipulation. It supports early sensorial and cognitive development in the Toddler and Primary environment, particularly for children in the 18-month to 3-year range working on cause-and-effect reasoning. Keep it on a low shelf as an accessible, self-correcting invitation that builds concentration and fine motor control without adult intervention.