I doubt there is anything ingame that is giftable.

Give them cash or your cc info.  That's about it I suspect.  Or, im not sure this is permitted, they turn their account over to you and you make the purchases.  I don't think there is really any other way.

Plarium should consider a "gift card" feature.  

You can always buy them a gift card for Google Play or Apple's equivalent, which'll let them use the money to buy Raid stuff.

You can just send me cash and tell me what you were going to buy. 

How much is a lump of coal where you are?

Can I buy a Google card and have it delivered to them digitally?

Yes

Your helpfulness has  you up to TWO lumps of coal.  

Why can i not kill udk in arena on  a sliver of health?

UDK is the Christmas Present that keeps on giving.

(There are plenty of UDK threads in the first few pages here, why don't you hop into one one those?)

Hmm...so for answering your question in a most efficient and clear way, he gets some coal?  Oh...send some to me as well...could use this as alternative heating. 

How about I send you a buffalo bisquit?