The VTech Baby Toot Toot Drivers Deluxe Track Set is £9.94 at Amazon right now, reduced from £12.99.
Delivery is free from Amazon, remember, if you spend £10 or more, so have a look at the Halloween themed add-ons to top you over £10.
You can connect Toot-Toot Drivers playsets to expand your Toot-Toot Drivers world, and this particular item includes 30 brightly coloured interchangeable track pieces plus 3 SmartPoint locations that trigger sounds and music.
Do note that SmartPoints only work with SmartPoint vehicles, though.
And I'll be honest - the reviews are a bit mixed so do have a good read of those before you make your mind up about this item. My lads have never owned any of these track sets so I can't comment very knowledgeably on them, I'm afraid, but I imagine it's a good price if you already have some and just want to extend your existing track for extra playing options.