The national organisation turned 21 this week and 120 girls from Battle, Robertsbridge, Brede, Guestling and Pett, Hastings, St Leonards and Bexhill Rainbows will enjoy a fairground themed celebration.

The celebrations were originally due to take place at Claverham Community College, but had to be moved to Silverdale School in Hastings.

1st Battle Rainbows are already getting into the spirit of the event and have created a 'ferris wheel' where the girls have been putting stickers on to mark off particular activities they have completed.

The children will be wearing Rainbow uniforms to the party, but will be sporting homemade medieval hats.

Six to eight different activities will be set up for the girls to enjoy, all featuring different fairground games and attractions, including hook a duck, tin can alley, Punch and Judy and a bouncy castle.

The event will climax with a giant pass the parcel, with 10 parcels being passed around.

Deb Latter, who leads 1st Battle Rainbows, said: "There have been several meetings between all of us since November to sort out the details of the party and we will all converge on Silverhill School and have our big party together.

"It will be a chance for Rainbows to come together from all the units which they do not usually do, so it's very exciting."

Several dignitaries will be attending the event.

The official Rainbow birthday week began on Monday and all Rainbows wore their uniforms to school on Wednesday.

Four other parties will take place across the county on Sunday at Heathfield, Peacehaven and Brighton.

Across the UK there are about 80,000 Rainbows aged five to seven, and in their birthday week, Girlguiding UK is inviting more adults to volunteer with Rainbow units.

Men and women interested in volunteering their time and skills on a more flexible basis are invited to take the 12 Hour Challenge, where volunteers offer their skills for just 12 hours a year.

More details of the 12 Hour Challenge and volunteering with a Rainbow unit can be found on the Girlguiding website at www.girlguiding.org.uk.

Alternatively, call 0800 169 5901 to register an interest.