Just a quick note on a very good attraction that Heather found in Northampton - the Northamptonshire Ironstone Railway Trust (or NIRT - I think they could have thought of a better name myself). Its in Hunsbury and Harriet, in the middle of a Thomas the Tank Engine obsession as she is, thought it was super. They have a pile of pleasantly decaying rolling stock, a small crane that looks like it will never move again, a tony model railway and a working deisel with a little run of track it can trundle up and down on. £5 bought me and a very excited toddler a nice little run through the woods. Overall the whole thing was highly recommended!
Sadly this did not terrify her obsession out of her, instead she seemed to think this was worryingly normal.
Anyway, here is a lovely picture of her staring adoringly up at a rusting crane (she called it Cranky).
See www.nirt.co.uk for more details!