If you are starting a collection have a look at the Ryobi range.
A couple of batteries for your set saves a lot of money over a couple of batteries per toy.
Has any one tried the Lithium ones yet?
From Screwfix and all good tool stores.
I have quite a few of the Ryobi range some of the tools such as the circular saw eat the batteries quickly but generally they are up to large DIY jobs.
Robert