Sensory materials to encourage the use of touch to learn about objects and the environment, as well as to help build an understanding of the body and its relation to the world around it. Many with sensory processing disorder or SPD are sensory defensive. Tactile defensive or TD may dislike some touch sensations (ie getting hands dirty, finger-paint, light touch that may occur when standing line, etc). Other sensory systems may also be defensive. Auditory - loud noises; oral- dislike textures and tastes so may have a very limited diet; vestibular (movement)- may easily get car sick or may need more input than others (ie swinging or spinning). Visual- may not tolerate bright, flickering or changing lights. Olfactory- may not tolerate strong aromas- pleasant or noxious.