The Object Permanence Box with Tray is a classic Infant/Toddler material designed to support the 8- to 12-month developmental window when children are actively constructing the concept that objects continue to exist when out of sight. The solid wooden box features a single opening on top and a tray to catch and return the ball, allowing the child to work independently through the full cycle of action and consequence. It's an essential addition to any prepared Nido or Toddler environment where you're supporting early hand-eye coordination alongside this foundational cognitive milestone.