Do you need to buy a ticket to enter, and then do you need to buy tickets for the attractions as well? Or is it something else?

Just buy the project ticket, no need to buy additional tickets. If you just go in and have a look, you have to buy a ticket.
You can buy tickets for whatever activities you want to play, and there is no need to buy additional tickets. If you just go in and have a look, you have to buy a ticket.
You can buy tickets for whatever activities you want to play, and there is no need to buy additional tickets. If you just go in and have a look, you have to buy a ticket.