Thanks guys that does help a lot.
I think the Takara will need to be a little more than the pendants because she takes quite a while to make (though I hope I'll get faster with practise!).
I used Fimo and Sculpey oven bake clays, artist acrylics and (many layers of) artist gloss varnish. But because they're so tiny, the total material costs for each isn't too much I think.
I hadn't thought of doing non pony stuff but I'd be happy to have a go at anything.