Buy those reusable ice cubes and put them in a jar numbering each one. Meet with teachers and create a poster for "cool down" activities. When students need a cool down break the teacher can ask them to pick an ice cube and do the numbered activity.
This voice levels poster is used in most preschools during my placesment, I think it is an effective way for teachers to control the voices in the kinder. Child also remember the colors and related voice levels that they should use inside and outside.