to expect a 20 month old to not run up and down constantly indoors?

[plagued]

please help - i am being woken at 6 a.m. every morning by a little boy in the flat above me constantly running up and down a very long coridoor morning noon and night (often whilst screaming and squealing with delight!)
On weekends he old often has a little friend over to "play" so there's two of them running up and down and screaming.

I mentioned it to my neighbours and asked if there's anything they could do, including offering to pay half for some soundproofing or thick carpeting - but they have taken it badly and say they can't stop him from "playing".
It's a while since my kids were that age - please advise, do you think it's reasonable or unreasonable to expect a child of that age to be stopped from running up and down - constantly, as a game - indoors??
thank you

What CD?

If I remember correctly it was Muse, The origins of Symetery (sp)

I reckon you want something with more bass to really do the job properly.

They moved within a year, I have often wondered if it was because they didnt like Muse :o

I dont like bad feelings between people but as my DH says "we can do this the easy way or the hard way"

I had the same problem with students living above our old flat. They always had parties until about 3/4am on a Friday night and we couldn't sleep. Putting a CD on full volume at 7am on the Saturday when we went to work seemed to do the trick from then on. Students/babies/drunks whatever. I know people say 'oh, it's children, that's what they do', but to me, noise is noise when you can't get to sleep.

my ds is 20 months and he does exactly the same and he too squeals with delight but it generally starts at 5am in my house