Small, postable present for 12 year old boy?

[GETTINGLIKEMYMOTHER]

Max about £15, something fun that's not heavy - it's got to go to Singapore with 2 others.
I have no idea, so would be v grateful for suggestions!

Deck of cards?

Xbox voucher code. ITunes. Amazon gift card..

Moon Ball and a bag of Tangfastics

Light weight sorry Adidas or Nike tshirt. Sugru.

Thanks, everybody!

iTunes voucher or headphones/earbuds

Mini drone? A lot of the ones on eBay come from Singapore.

Definitely an Amazon voucher. My two used to love those at that age.

A rubric cube. One of the better ones that move smoothly.

Stupid phone - RUBIX

Definitely a voucher! Nothing 12 year olds like more than a bit of money to spend.

Decent earphones (most come in a small plastic box, so perfect for posting!), and an iTunes or Amazon voucher.

Tshirt - a sports team one, or a baseball cap.