Great small lightweight present ideas?

[whatsitallabout1]

We are travelling over Xmas this year (incl. flights) so children are just going to have a few small things on the day itself - but what?!

Aged 10 - 14 boys + girls...any ideas of great small lightweight presents?! So far I have got them each a trick yoyo and a top trumps game...

Lego - small boxes. Paperback books.

Smart Egg Labyrinth Puzzle
Addictaball mini
Airfix kit
Card trick book and deck of magic playing cards
Klutz How To Draw books - they do Star Wars, Lego, 3D drawing etc...

Stockings are "disposible" aka food and drink we can't get at home, but can get in the UK! And books, which I would stock up on anyway.
Presents are a Nintendo switch (shared), some board games, knex and Lego.
Me plus 2 kids will travel out on 2 suitcases, with the smaller suitcase inside a larger one. All shopping is being delivered to Mums. Third suitcase for filling with presents, and essentials that come back every trip.
Be careful with too many books. They rapidly increase suitcase weight.

Watches
Fit Bits
Tamagotchi key ring pets

New clothes to wear while away.

Many thanks for all the ideas! Love the card trick idea - have ordered some trick packs for ds, he'll love them! They got cheap Fire tablets last Xmas so we've loaded them up with books already, they all read quite quickly so we'd never manage to take enough paperbacks. I already got a tamigotchi thing for the littlest.

If anyone else is in a similar position I came across this
Fact Tape which I like the look of.

Also found "Deadly Disease Top Trumps" which sounds like a laugh a minute, will appeal to ds!

We are going to do "Christmas" when we get back in January, but I can't bring myself to do nothing at all on the day!