Suddenly step-nieces and nephews to buy for - help!

[DonInKillerHeels]

We're pretty new parents, and have only just started getting the hang of buying presents for DS 16 months. All of a sudden, all my siblings are married and have children and step children of various ages! We know what to buy for the babies, but what should we buy for the following:

Boy, 14
Girl, 12
Boy, 5.5
Boy, 3

??? We're completely clueless.

Oh - and whatever it is needs to be small and preferably flat-ish and/or light in weight as we're posting to Australia.

Can you get amazon to deliver direct to them? iTunes vouchers for the older ones. Lego for the 5 year old? Can't remember 3!

Yes vouchers for the older ones.

5.5 year old - ask their parents re dvd? Cars2? Rio? Smurfs? Rango?

3 year old - as obove.

Otherwise the 5.5 year old might like a lighsaber? Lego? Joke kit? Magic set?

3yr old - duplo? Arts + crafts stuff? Nice book?