I think that The Efteling has a little bit of something for everyone. There is a good mix of slightly more tame rides alongside the horrifying terror of upside down loops (I used to LOVE roller coasters like that, but I think I'm getting old because they just aren't fun for me anymore).
Martijn is near the back in a yellow shirt.
The best rides though, are the slightly more mellow indoor rides like the Droomvlucht (The Dreamflight). You get into a gondola and "fly" through scenes of fairies, forests, trolls, and other fantastical things. It seems like a lot of detail goes into getting the ambience just right, and the music that goes along really fits with what you're looking at.
The entrance to the Droomvlucht
Honestly though, the main reason you need to visit The Efteling is Het Sprookjesbos (The Fairytale Forest). There are more than 20 different fairy tale scenes depicted in Het Sprookjesbos.
Sign pointing the way to Little Red Riding Hood
Most are inspired by the brothers Grimm, Hans Christian Andersen and Charles Perrault and brought to life with animatronics. You can watch the mean witch climbing up and down Rapunzel's long hair, the little red dancing shoes, and the wolf waiting for Little Red Riding hood among other things.
Collage of Het Sprookjesbos
Even the ATMs are cool!
I love clever little plays on words. The big couch is an ATM... the Dutch word for couch is bank. Get it? The bank is a BANK! Oh geez, I love it!