I've been keeping an eye on these for the past month to go with the Toot Toot Drivers Train Station I got my daughter for Christmas.
They seem to be around £12.99 but noticed its £8.50 now. I have a 5% NUS Extra discount for Amazon as well which took the total down to £8.07
I nearly conceded and pay £12.99 but via the Tesco Clubcard boost deal and therefore use £6.50 in vouchers but this Amazon price drop came just in time.
Hope you found this deal useful.