Sixth form students from Uckfield Community Technology College raised more than £800 for Great Ormond Street Hospital when they dressed up as different themed characters to raise funds.
Superheroes, disney and Doctor Who characters paraded through the school corridors - and during the rest of the week students sold sweets and cakes to raise money.
A spokesman for the school said the students decided to stage the fundraiser because they have personal connections to the hospital and wanted to give something back to it.
The spokesman said: “The students contacted Great Ormond Street Hospital to let them know their plans and this resulted in great help with promotional materials and support from Louise Ferns, the GOSH schools presenter for East Sussex.
“Louise visited the college to support the activities and was genuinely impressed with the effort and commitment of our students.”
After her visit she wrote to the school: “I am so seriously impressed by the politeness and behaviour of all the students I met, a real credit to Uckfield Technology College and all the staff.
“I really enjoyed my afternoon with your students, I don’t think my presence was actually needed, as I believe they had all worked so hard to make their fundraising a success. However, I am so pleased that I did not miss out on witnessing such a successful event.”
The students promoted their activities before and during the event and at the end of the week had raised a total of £880 including proceeds from a Just Giving page they had set up.
In school alone they raised a staggering £650 in five days.
The students said they would like to thank all of the staff for their support, with a special thanks to Mr Williams for his ongoing support.
The spokesman added: “Huge congratulations to the students - Joseph Worsell and a group of his friends Holly Fisher, Katie Love, George Reed, Beth Batson, Sarah Brown, Daisy Tweed, Lucie Hunter, Ross Parker, Ben Poole, Anna Roe, Nicole Rainbow, Tom Dadswell, Rob Cranfied and Adam Rose. A fantastic effort.”