3 yrs. & up. The Sorting Hatchable Kit makes sorting a cinch! The ready-to-use kit includes everything you need to review these key concepts in small groups. The Hatchable Kit provides step-by-step instructions that enable teachers to implement comprehensive and engaging lessons using a variety of hands-on materials (a sturdy sorting work-mat and animal counters) that prompt children to sort objects by attributes (color and type of animal).