If you buy them online the standard price per adult is 22.95 and 18.95 per child. But there is a Groupon for 23.00 that includes the monorail, the carousel and the little boat for as many times as you like during the day. They have the bikes that you can rent, the price depends on how many hours they rent it.
Adults 22 and children 18, in the magazines of the road stops there is a discount of 3 usd per person, I recommend taking enough cold drinks in a thermal refrigerator, on the way find each drink at 3.50
My wife bought summerpass, wich is much cheaper, if you live close and plan come back. So, I really don't know about tickets prices.
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