There are a whole host of links to free MFL resources on: http://www.frenchteacher.net/Primaryresources.htm
The best of which is probably the award winning ‘A Tantot’ website: http://www.atantot.co.uk/menu.htm
Aimed at KS2, it contains games and activities designed to improve French, German and Spanish.
The colourful activities of ‘Le Club Francais’ are also worth a look: http://www.leclubfrancais.co.uk/babelzone/frenchpages/gamezonefrench.htm
So too are the recently added and still growing BBC resources: http://www.bbc.co.uk/schools/primaryfrench/