Learning Resources Sorting Muffin Pans. This set of four plastic muffin trays is ideal for developing a variety of early maths skills as children use them with counters and other small objects in sorting and classifying activities. Sturdy trays also lend themselves to use within imaginative play as children’s pretend to be bakers. Pretend trays measure 25cm L. Suitable for ages 3+. Extend the learning with Learning Resources Mini Muffin Counters (available separately).