UNOW is fortunate to have a wide range of materials to use in the classroom. Toys and materials may be store bought, teacher made, and natural materials from nature or common house hold items. Materials are selected based on interests and abilities, exploratory value and learning objectives of the children. Some materials are shared among classrooms within the same age groups. Items are rotated frequently to keep interest fresh. Sometimes an item may remain in the room for several weeks if children are interested and sometimes items are added to existing materials or interest areas to extend the play into the next level of learning. Items selected are meant to grow with the children. Knowing that children grow and develop over the course of the year, teachers are cognizant to change materials and activities accordingly.