The summer holiday activity programme will run from Monday 29 July to Friday 30 August, with something for everyone aged 7 to 19 (up to 25 with special needs).
A variety of sessions are on offer for children and young people, including street dance, self-defence, climbing, radio presenting, street magic, BMX skills, and much more.
The programme also includes sports such as fencing, tennis, golf and football.
Families are encouraged to book online from Wednesday 12 June.
Michelle Philipson from Uxbridge said: "The Fiesta programme is great for the children of Hillingdon and we are really glad that the council run the courses over the summer holidays. My children Yasmin and Zoe attended the young enterprise course last year and both enjoyed it and learned so much. We're all looking forward to this year's programme."
Courses will take place at various venues across Hillingdon, including the council's young people's centres, community centres and sports halls.
Councillor David Simmonds, Hillingdon Council's Cabinet Member for Education and Children's Services, said: "I'm delighted that once again we are able to offer a spectacular range of fun and educational activities this summer for local children and young people to enjoy. I hope families across the borough will join in the fun, make new friends and try their hand at something new.
"I do advise people book as early as possible to avoid disappointment, as places get snapped up very quickly."
For more information and to book a place from Wednesday 12 June, visit: www.hillingdon.gov.uk/fiesta