The park is free to enter and there are many free rides most of which are for kids I suspect as all signs were only in Finnish. You can either buy separate one ride tickets for 7 euro each or an entry to all rides armband for 37 euro. So if you are planning on riding over 6 rides it is worth getting the armband. There are also reduced ticket prices for coming in in the last 4 hours.
There about 4 big rides whose lines are obviously longer than the smaller ones but n the whole the wait time was not to long.
Well worth the trip and its proximity to the Olympic village made it easy to tie into a day of sight seeing. Also the trams stop close to the entrance which makes it easy to get to and home from, especially if wet (from the log and water raft rides).
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