In answer to your question hope this helps:

Party Cost (which includes all of the above):
Adults (over 18): $10
Adults with kids and kids (13-18): $5
no charge for age 12 and under.

Day fees: If it is your visit EVER, then published day fees would be half price.

Day fees are reduced for those with children on this weekend:
$40 for family-two adults (age 35 & Up) with kids (regular fee $55)
$32 for single (regular fee $45)
No charge for under 18 as always
Young adults (ages 18-34)
$30 for couple/family
$25 for single