Symptoms of SPD can vary widely among children but generally fall into two categories: over-responsivity and under-responsivity to sensory stimuli. Signs of over-responsivity might include hypersensitivity to textures, sounds, or lights, leading to avoidance behaviors. Conversely, under-responsive children may seek out intense sensory experiences, such as spinning or crashing into objects. Other common symptoms include difficulties with balance, coordination, and motor skills.