How much does it cost per child?

8$ child or adult

Or u can go to your local library and borrow a free pass from there. Sometimes they don't have it so u have too call in advance.

Thank you all so much for your answers. Have a great day.

Also, Seniors are $5, and if u live in MA and have an EBT card, you can get in for $3 (up to four ppl can get in for this price. Visit the website for more info). As well, children 1 year and younger are free.