Philip Harris Ticker Timer Age 4-5 Great for making moving vehicles

Great for making moving vehicles

choose a Pro:Scribe Marker

100 solid equilateral triangles

• Colour Filters set of six for F4H28615

Philip Harris Ticker Timer Age 4-5 Great for making moving vehicles"This extremely popular unit has revolutionised experiments because of the quality of the traces it makes, and the reliability of the mechanism ensures that ticker tape experiments are no longer hit and miss. There is no double dotting or smearing, even at high speeds. No pen or carbon discs are required. Friction between tape and ticker timer is kept to a minimum. Excellent results can be expected. The unit comes with a boss head so that it can be