No one under eighteen

🚱 non-potable water ☢ radioactive ☢️ radioactive 🚫 prohibited ⚠ warning 🚳 no bicycles ☣ biohazard ☣️ biohazard 🚭 no smoking 🚸 children crossing 🚷 no pedestrians ⛔ no entry 📵 no mobile phones 🚯 no littering ⚠️ warning