What is the name of that movie that had a boy who could travel in
stamps? I believe I saw it on tv and maybe it was the disney
channel...

Hello.

It sounds like you're describing "Tommy Tricker and the Stamp Traveller" (1988)
http://www.imdb.com/title/tt0096282/maindetails

Here's one viewer's description:

'There is an excellent Canadian children's movie (children of all ages,
that is) called something like "Tommy Trickster (SIC) and the Stamp
Traveller" The basis of the film is that the hero (a young boy) can
travel the globe by mail by shrinking and blending into the scene of
postage stamps.'
source: google groups
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&c2coff=1&selm=1994Jan24.224518.26096%40emr1.emr.ca

Also see:
ChucksConnection Film Review: Tommy Tricker and the Stamp Traveller
http://www.chucksconnection.com/tricker.html

Video from Amazon.com:
http://www.amazon.com/exec/obidos/tg/detail/-/6303451160/

There was also a sequel called "The Return of Tommy Tricker"
http://www.imdb.com/title/tt0110976/maindetails
Video from Roberts Hard to Find videos:
http://www.robertsvideos.com/browse.php3?alpha=R&catid=&incr=1&page=24

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search strategy:
imdb.com, plot search: stamps

I hope "Tommy Tricker" is the movie that you had in mind. If not,
please request clarification. Thanks.

Thank you thank you