When sourcing sound and light toy guns, prioritize high-quality ABS plastic for impact resistance. The electronic components should feature integrated circuit (IC) chips that provide clear, multi-layered sound effects rather than distorted noise. For lighting, ensure the use of energy-efficient LEDs with a brightness level that is eye-safe for children. Additionally, check the battery compartment security, which must be fastened with screws to prevent children from accessing small batteries, complying with international safety standards.