We asked Matthew what he wanted and he responded “cogs and pulleys!” Robert’s response was “ooh, steampunk!” but I was a little more cautious in embracing this notion as:
a) Matthew is 7 and he hasn’t come across steampunk yet and
b) if it doesn’t contain bright colours he doesn’t want it; brass and sepia just don’t fit into this picture.
After a little more conversation I had a clearer picture of brightly coloured stencilled cogs connected by the occasional belt. A further search of Ebay, and a couple of hours later I had these:
* the actual portal to Narnia lives here. (no, honestly, just scroll down!)