Sadly, Frozen Fun does not appear to be at Disneyland anymore, but you can experience a similar attraction in Florida at Hollywood Studios. Click here for more information about this. The rest of my post will be about Disneyland, specifically California Adventure.
In California Adventure they have a Frozen Fun area, where you can enter a world that resembles Arendelle, right down to the frozen fountain that graces the center of the room.
If you get hungry, they have a cute eating area and lots of fun snacks to try!
This is also the area you meet Olaf in. The line can be rather long, but we got there at a time where we only had to wait 10 minutes! Play it by ear, and ask an employee what time of day the line has been the shortest recently.
There are also performers that come to the gazebo area. We listened to a group of singers, and then they had a brass group/accordion come out which was pretty cool. They are very interactive and love to get the audience (especially kids) involved. I don't have any photos of them, but here is the area they perform:
The real snow was very cool, too! Employees build small snowmen and all the kids try and help. One rule they have is no throwing snow, so make sure you don't start any impromptu snowball fights!
Every 15 minutes or so it also "snows" here, too! It's really a cool effect.
Disney's Frozen Fun area is really a great way to beat the summer heat (or in our case, the spring heat) and enjoy Anna and Elsa's kingdom in a unique way. If you get the chance to visit this area in Disneyland (if they bring it back) it will be located over by the Monster's Inc ride, where they have had indoor Tron stuff back when Tron: Legacy was in DCA. Enjoy some more pictures of this area!