Thans for your help!!

Well, walking would take a long time. There are several quicker options which would involve vehicular transport, namely automobiles, trains, and in come cases buses.

Which would you prefer?

By the way, where is Praga? Is it in France or the Netherlands?

Thanks for your response!! yes i thokn by walking i woul be a very long trip!..... i´m looking for the cheapest option, i think is by train but i´m not sure.
Do you have any idea of schedules, costs, train companies etc.

i´m planning to be there for 3 days whaths better to spend 1 day in amsterdam and 2 in Praga o backwards.
Thanks in advance
rossana

Check www.whichbudget.com for cheap intra-Europe flights. It can be cheaper than taking a train, in the case of Prague.

For trains to Amsterdam from Paris, go to www.voyages-sncf.com.

flights would ordinarily be cheaper than the train. In addition to StCirq's reference also try www.skyscanner.net

However you could take overnight trains Paris to Prague and Prague to Amsterdam and save hotel cost each night and that could factor into perhaps a cheaper way.

I like to use www.bahn.de to check train schedules across Europe - but the french site StCirq will give you the same info.

The fastest trains from Paris to Prague take 11-12 hrs, and require 1 to 2 changes enroute.

First thing I'd do is invest in a map of Europe and look at the distances you're talking about.