Planning; costume for actors

For our actors/actresses, we want them to be able to pull across a childish appearance throughout the music video. To help us do this, we need to keep in mind both costume AND props that they may have/hold to show the child like memories in the video. We want them to be able to show individuality and pull across the different ways in which people lived their lives when they were younger. The idea of our music video is 'childhood memories' therefore we are coming up with ideas from our actors/actresses to help us bring ideas together.
Costumes we want for our actors/actresses;
These may include...
Pig Tails - 
Colourful - 
Child girl clothing - 
Child boy clothing - 

Props may include items such as teddy bears, Christmas decorations, birthday cake etc.