5year old who likes Horrid henry - what shall I get for his birthday?

[FeelingLucky]

My nephew is going to be 5. He seems to have every conceivable plastic toy in the world. My brother told me he is into Horrid Henry.
I don't even know what Horrid henry is.
for those of you who are in the know, any advice on what to buy him, horrid henry related?
Want to spend between £10-20

TIA

Does he have the books? There are lots of them.
Horrid Henry DVD
Tickets to see Horrid Henry Live (if still running)
\lnk{http://www.amazon.co.uk/Horrid-Henry-Stripe-Sleeve-t-shirt/dp/B001GZOE1O\Horrid Henry top}
HH toys

You can get the stories on DVD

Noope. I think I mean CD. Round silver thingy goes in music machine, makes sound no pictures.

Sorry,I am very very tired.

Will now remove self and go bury head in satellite TV hinterland.

Thanks Hulababy.
He'll probbaly have the books already. Those mischief sets look good - any idea where I can buy them as opposed to ordering from Amazon. I've left it a bit late and need them for weekend
Hope to go shopping at Westfield shopping centre during my lunch break tomorrow

TIA

cathpot - DVD would be good as he's addicted to telly.
Sympathy to you I'm knackered too, can't think, hence posting on mumsnet to get my present problem sorted.
Long day ...

Sign up for free month's trial of Amazon Prime - free next day delivery. Then cancel it next day.

Argos

Thank you, thank you, thank you ... there's an Argos right by me, so shall run down on Saturday morning

oh dear, was going to buy the voice changer, but none in nearest store. Aaarrrgghhh ... any other ideas where I can go to buy.
Pleeeeease

There is a pack of Horrid Henry activity books on one of The Book People sites.