I have been looking to buy one of these for my Daughter and found this to be the cheapest by over £12, there is also 7% Quidco (£2.30)
DORA THE EXPLORER V.SMILE PINK
Save 30% Was £49.99
Includes a microphone and an improved joystick with pen and drawing pad. Accompanied by Dora the Explorer "Dora`s fix-it adventure" learning game. Add a second joy stick for 2-player gaming. Built in storage holds to 9 games. TV, extra controller and mains adaptor not included.
For ages 3-7 years.
If you are a new customer you might also get a £15 discount.
Requires 4x AA batteries (not supplied).