A small scale gas preparation kit for producing gases which can be collected over water e.g. oxygen hydrogen and carbon dioxide.The kit comprises of:-Plastic tank with lidTest tube standFive test tubes: 150mm x 24mm with stoppers.Thistle funnel.Test tube with side arm and one-hole stopper.Special glass chimney shelf.Delivery tube and tubing connector.It is not recommended that these tubes be exposed to temperatures above 60°C.The tank and lid form a storage box for all components.