What would a 5 y.o. boy like for his b'day?

[MrsFogi]

I suppose we'll be spending about £20 - I have no idea what 5 y.o.s are interested in so do enlighten me if you have one!

I have a 6 year old ds and his most played with christmas pressies were:

starwars lego
Dr who tardis
selection of figures (dr who/starwars/WWE)

DS has just received for his 5th and been delighted by;

a metal detector
a secret spy diary with invisible pen - these two top of the list

followed by;
magic kit
'What a performance' game (orchard toys)
Hama Beads Pets
Sciency kits to make balloon-powered racing cars and a rocket

generally I would recommend things that are explorer/space/spy/secret/things or practical jokes - eg whoopee cushion etc