Best Lock Construction Fireman and Truck 50-Piece Building Set. Call 911 - the fire department respond to emergency calls in double-quick time to keep your town safe from hazards in this superb value construction set from Best-Lock Construction Toys. Providing hours of fun for children aged 5 years up, and compatible with other leading brands, the blocks offer amazing value as well as building highly detailed and realistic models with lots of cool play elements to entertain generations of building block fans - from first time builders to long standing collectors.