Teach the children the first verse and chorus of "I can sing a Rainbow song" in sign language
Then sign and sign to parents at the end of the night.
There are a couple of different sign for purple so select one you thing is easy for you group to learn.
Red and yellow and
Pink and Green
Purple and orange and blue
I can sing a rainbow
Sing a rainbow
Sing a rainbow too
Signs can be learnt from u tube/website if required.
Teach the children the first verse and chorus of I can sing a Rainbow song.
Teach the child each sign for the colours as you sing the song. (Red, yellow, pink, green, purple, orange and blue) plus signs for I, sing and rainbow.
Then sign and sign to parents at the end of the night