A collection of little superheroes will run amok in Sandall Park next month, but it's all for a good cause.
The little Batmen, Supermen and Spidermen are raising money to help a young Doncaster boy receiving treatment for a brain tumour.
Eight-year-old Henri Crisp needs innovative cancer treatment in the United States, and the young kids and their parents hope to raise plenty of money to help him.
A bonus for organiser Alison Maxfield would be letting people know about Henri's plight. It's the second time he's facing a cancer battle.
The child minder from Woodhouse Road said those in her profession were trained to treat every child like a superhero.
"Not all superheroes wear capes," she said.
"They're all stronger than they think."
Ms Maxfield is a family friend of Henri and his mother, Joann.
She said news of his second diagnosis came as a shock.
"I was nearly sick," she said, after Joann told her the bad news.
"I thought 'we need to do something'."
The kids will walk and run around the park on April 8. Ms Maxfield said parents were also welcome to dress up and tag along.
Afterwards, she's planning on having a get-together at the park's cafe.
"For a bacon sandwich and a cup of tea," Ms Maxfield said.
Her message to anyone in the area is that Henri's plight could affect anyone.
"All I'm saying is, 'this could be your child'," she said.
She said getting a big total was about plenty of people donating small amounts to the cause.
"People don't understand, you don't have to give big," she said.
"If everybody in the area but a pound in, we'd have thousands."
Ms Maxfield expects plenty of kids to take part, but she wants lots of parents there, too.
"I don't want everyone just dropping their kids off and thinking I can look after them all," Ms Maxfield said.
"There's got to be a lot of adults there because of the safety aspect."
Mrs Crisp said she was grateful for any efforts in getting help for Henri.
"She's put the fun into fundraising," Mrs Crisp said.
"We are grateful to everyone who takes part."