When sourcing sensory integration toys, prioritize non-toxic, BPA-free, and phthalate-free materials such as food-grade silicone, natural wood, or high-density reinforced plastics. For weighted products like blankets or vests, ensure the filling consists of non-toxic glass beads or poly-pellets secured with double-stitched reinforced seams to prevent leakage. For tactile toys, the surface texture must be burr-free and smooth to prevent skin irritation, while electronic sensory items should feature adjustable volume and brightness levels to accommodate children with different sensory thresholds.