What does Efteling mean?

I'm coming to Holland for a visit and to spend lets of time with a friend and she's promised to take me to the Efteling. What does efteling mean, the reply from her was that it was the most fun place in all the world, so I'm really looking forward to going. I'm going to make sure everyone has a great time their and I'm formulating plans but I wont go into it too much here as I want it all to be a big suprise