The few times Stephen Grimmer has been to Fairy Meadow Beach, he has stood frozen, scanning the sand.
He doesn't soak up the sun or waves, but remembers the hot summer day his sister, a three-year-old "little blondie", was kidnapped from outside a change shed on the Wollongong beach.
It has been more than 42 years since Cheryl Grimmer was snatched by an unknown man, with her family enduring many moments of false hope over the decades including a ransom note, a lock of hair sent to police and a coroner's inquest.
The Grimmer family are now hoping a $100,000 reward put up by the NSW government will answer the questions that continue to haunt them.
Mr Grimmer, who was five at the time of his sister's disappearance, said he had never let go of what happened.
"Every day, every day [it's] in the back of my mind.
"It's hard sometimes, especially if I go back to Fairy Meadow Beach.
"You're always staring at the beach, all the time looking around."
The children's father, Vince, died eight years ago still wondering what happened to his only daughter, and their mother Carole is now very ill.
"She's OK, but it's there with her every day," Mr Grimmer said.
Fresh arrivals from Britain, Mrs Grimmer, her three sons and daughter had been swimming on the afternoon of January 12, 1970, before the children went to the change sheds to get out of their soggy costumes.
Carrying her swimmers and towel in a bundle, Cheryl was standing near a bubbler when witnesses saw a man pick her up and run into the car park.
At an inquest into her disappearance last year, a coroner ruled Cheryl had died soon after the man took her.
The inquest heard a 2008 reinvestigation into the case looked into the possibility Cheryl was either killed and buried or kept by her abductor and brought up under another name.
Detective Sergeant James Dark said police re-examined suspects, the ransom note, and the lock of an unknown person's hair that was sent to police, but investigators did not get enough evidence to charge anyone.
The ransom note, demanding $10,000, and saying Cheryl was unharmed, was sent to police in the days after she disappeared.
The kidnapper specified a meeting time and place, but did not show up, and no other ransom demands were made.
Detective Sergeant Dark said the big police operation and publicity may have put the offender off.
"I genuinely believe that someone out there has information," he said.
Police Minister Michael Gallacher said the family relived the kidnapping "day after day, week after week, year after year".
Mr Gallacher said the kidnapper, described as a man in his 30s or 40s, could be elderly or dead, but the family still needed to know what happened to Cheryl.
"The release today of the reward is an incentive for people to come forward.
"But there's a bigger incentive - the bigger incentive is the family."