As they arrived at the river Styx, they realised that they needed to find a way to get past the river. Charon, the boatman that took the dead's souls across the river hadn't seen them yet however they were almost certain that he wouldn't let them ride his boat since he only let souls ride. They also didn't have any money to pay him to get across. They decided to try to find another way across the river Styx. At first they thought of building their own boat, but then they realised that there was no material to use to make a boat. Before they had left Camp Half-Blood, Percy had packed some items that they might need but nothing in his bag were useful to cross the river STYX.
"If only Annabeth was here," Sighed Piper, "She always had amazing ideas."
"Yeah" Said Percy, "She always knew what to do."
All of a sudden Charon spotted them.
"You're not alive," He said "What are you doing here."
Percy knew that they couldn't say that they were trying to bring someone back to life or else Charon would tell Hades and he would get mad and tell them that were not allowed to bring anyone back to life.
"Err….We...have a message for Hades," Said Percy, "He told us that you would bring us across.
Charon eyed them suspiciously but to their surprise actually brought them across the river! They were delighted to had crossed so easily until they realised that the still needed to get past another obstacle. They needed to get past Cerberus and Percy didn't bring anything to pass him either.