Presents for an 12 yr old boy and 9 yr old girl?

[stumblymonkey]

I'm seeing my half sister after New Year. To cut an extremely long story short we don't know each other very well but are trying to see each other more.

She has two children - a boy of 12 and a girl of 8/9. I've only met them twice so other than them being nice kids I don't really know them or what they're into.

What would you buy them as a present up to £30 each...?

[iseenodust]

As you don't know them I would go for cinema vouchers & blatantly stealing from another thread make them hot chocolate stockings ie. hot chocolate powder (Whitard do boxes with selection of different flavours), mini marshmallows, squirty cream, chocolate stirrers.