The family of Nova Yates have been told he has just months to live and they are striving to ensure he is given the best possible experiences.
A play date was donated to Nova and put on by the Bee Hub, who gave him and his friends access to their wide range of play facilities.
17 pictures you'll only understand if you're from Leeds
Leeds Olympian Nicola Adams and girlfriend Ella Baig reveal baby boy's name as they talk about parenthood
Resident claims Leeds pub music is 'like a bad night in Benidorm’ amid plans to extend opening hours
Two teenagers in hospital after crashed motorbike sets on fire on Leeds street
Leeds heatwave: City braced as Met Office issues yellow thunderstorm warning
Posting on Facebook, Nova's mum Heather Barrott said: "Just wanted to share what an amazing place The Bee Hub is and [there are] lovely people running [it].
"My son had the best play date today that was kindly donated by Beth Stanbridge for my 4-year-old son with terminal brain cancer to enjoy privately with his friends.
"Thank you, Nova said it was the best day ever!"
A GoFundMe page was set up for Nova and has already raised nearly £12,000, which has gone towards creating happy memories for him.
He was diagnosed with a rare form of brain cancer at the age of two and underwent surgery for 10 hours to debulk the tumour.
Following the surgery, he had to learn basics such as eating and walking again before then starting chemotherapy.
He underwent chemotherapy for 18 months before being offered radiotherapy, which he was given for six weeks.
However, all options have now been exhausted and his family are focused on ensuring he enjoys the time he has.
Speaking to the YEP in May, Nova's mum Heather said: "We had amazing support on the outside but whilst in hospital, I was the only person he had for support and he was the only person I had.
"He has easily spent 200 days in hospital.
"He is so brave."
The GoFundMe page can be accessed here.