Small present for 6yo boy

[attheendoftheday]

I need a small present for a friend's son, budget of £5, and preferably able to be delivered. I had planned to get him a little lego set but the shop where I'd seen it was out of stock. Any ideas?

Colouring/craft bits (a nice colouring book, pens, pancils etc..)?
A space hopper? (i think you can get them in Tesco for around £5)
A nice book?

small lego helicopter

10 packs of Match Attax cards.

Tec Deck

Top trumps, you can get disney cars/ben 10 ones which most 6yr old boys will like

Thank you, great ideas! Think I will go with the lego helicopter, it is perfect.