need to buy a present for a 10YO boy, ideas please

[Cremeeggsandkitkatsoldiers]

hi, no idea what he's into
£10 ish (less if possible)
not a voucher
thanks so much

Four packets of little lego people
selection of bouncy balls or marbles
magnet and iron filings
Alex Rider book
football
magnetic putty

How about something like this or maybe something form here or anything else from that site. There are some things on there that DS (11) would love.

49p over budget but how about this? I have just bought 2 for parties my DS is going to.

thank you so much, think I got the idea now x