Star Wars: The Force Unleashed - Wii £19.57 Delivered @ AmazonUK

Although this one is not well rated by gamers, the younger kids love using the WiiMotes as light sabers. A possible last minute xmas present if you have the Amazon Prime trial.

Here's the description from the Amazon page:

As its name implies, The Force Unleashed completely re-imagines the scope and scale of the Force. The Wii version will not only give you a solid story-line developed by LucasArts involving the Darth Vader's secret apprentice, but you'll experience a new style of gameplay only the Wii can offer. With the Wiimote and Nunchuk you'll be able to battle your way through your enemies utilizing your Lightsaber attacks and Force powers. Not only can you experience this new control system in story mode, but you can also try your Jedi skills against a friend in the Wii, "Battle Mode." Joining the Dark Side doesn't seem like such a bad idea after all.