Depends on what method of transportation you use. The cheapest by far is Eurolines buses. You can get round-trip for about 50 Euros. I believe it's an overnight bus.
Frankfurt to Paris is 573km and Frankfurt to Amsterdam is 442km. So Paris is farther from Frankfurt than Amsterdam.
I like Paris more
The driving distance from Paris, France to Amsterdam, Netherlands is about 310 miles.
Take the Thalys to Amsterdam. When in Amsterdam, there will be a direct train to Groningen
About 315 miles.
In Amsterdam, Paris and New York City.
KLM and Air France
by plane, train (Thalys) or car (about 8 hours)
In Amsterdam, Paris and New York City.
Amsterdam, Paris, New York.
525 kilometres following E19.
The van Gogh Museum is in Amsterdam, Holland.