Slow. Children At Play Sign | With Fixings | Road Safety SignSlow. Children At Play Sign With Rails and Brackets for fixing to posts This sign clearly communicates the message Slow. Children At Play Sign and is designed to help organisations display clear guidance, warnings or instructions in the workplace. Clear signage supports safer operations and ensures staff, visitors and contractors understand the rules that apply within a particular area. Signs such as this are commonly used in factories, warehouses,