Hi
As per above..
The cost of shipping them, even if it is allowed, would put them at a far higher price than if you just shopped online at a US retailer and had them sent within the US.
Also, again if allowed, then the only real reason to send from here is if they are 'totally British' as it were and are just not available in the US. Considering you'll get a little lump of a plastic figure or a paper hat etc, I'd say it isn't really worth it - but I understand it's the thought behind it all that you are trying to 'send' !
Cheers, DtM! West London & Slough UK!