Adidas Blue Strap Watch. £8.49 + £1.99 for delivery. This watch isn't described as a boys watch in the product description but from reading the reviews it seems it is.
White easy to read dial.
Blue polyurethane strap.
Water resistant to 5m.
You can get a liitle bit of Quidco/TCB back or you can go through the Nectar card website and get some points.