1943 saw the establishment of the Trefoil Guild for members over 21 (now 18) who wished to remain a part of the movement but couldn't remain active with a unit. The section for the youngest members of the association, Rainbows, was introduced in 1987 for girls aged 5–7 (4–7 in Ulster). In 1936 the then Girl Guides Association was one of the founding members of The National Council for Voluntary Youth Services (NCVYS), which was created with the aim of promoting and supporting youth development work across England. Girlguiding has remained a member of NCVYS ever since. In 1964, a "Working Party" was established to review and update the whole programme of the association; their 195-page report was published in 1966 under the title Tomorrow's Guide. These recommendations were implemented in 1968 and included new uniforms, badges and awards across all the sections of the association. Land, Sea and Air Rangers were merged into a single Ranger Guide Service Section. Programme Girls are organised into sections by age. These are Rainbows, Brownies, Guides and Rangers. Rainbow Guides Rainbow Guides or Rainbows are aged from 4 to 7 years old (5 in some areas). Activities are organised around six core areas: Know Myself, Be Well, Express Myself, Take Action, Have Adventures, Skills For My Future. In the 1980s and 1990s, Rainbows wore a tabard in one of the colours of the Rainbow. Nowadays, the red uniform is worn, with Rainbows often referred to as “Little Reds.” There is a baseball cap, cycling shorts, hoodie, joggers, and polo shirt to choose from. Each girl makes a promise on their enrolment in a Rainbow unit and must be able to understand and carry out the promise. This Promise is a simplified version of the promise that older members make. Rainbows can also receive other badges for activities that they attend (possibly with other units), and other activities they complete within their unit, maybe after a themed half term. During 2008, a special challenge book Olivia's Favourites was produced to commemorate the 21st Birthday of the section and a badge was produced. At the end of the Rainbow programme, as the girls get ready to move on to Brownies, girls undertake the personal Pot of Gold Challenge. Brownie Guides Brownie Guides or Brownies are aged seven to ten years old. They go along to camps, holidays, day trips and sleepovers. They get together with