Regarding the frogs, you can also buy them in sets and play them like a xylophone..

Lady P You could try Ray Mans oriental instrument shop in Camden???

I can get a single note out of the flute (apparently its a solo nostril design) but can't figure out how to change note or how to breathe in while playing (do you use cyclic breathing like with a didgeridoo or just suck air in through your ears??)