Haynes Internal combustion engine model...
Build a realistic working model of a combustion engine. Includes light and sound features, light up spark plugs and moving pistons, valvegear and fan belt. Includes a 'Haynes Manual'
http://www.haynes.co.uk/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10001&storeId=10001&productId=44601&langId=-1