They hand out colorful stress relievers and koosh balls called manipulatives to help autistic audience members relax before and during the performance.

他们分发五颜六色的压力缓解剂和称为操纵剂的 koosh 球，以帮助患有自闭症的观众在表演前和表演期间放松。

For instance, in the learning of fractions, students can participate in a visual fraction representation activity, where they use manipulatives to explore the concept of equivalent fractions and compare different fraction sizes.

例如，在分数的学习中，学生可以参与视觉分数表示活动，他们在其中使用操作来探索等值分数的概念并比较不同的分数大小。