This noisy idea comes from the binder Science Is..., by Susan V. Bosak.
Sit players in a circle and move around it whispering the name of a different animal in everyone's ear (mouse, duck, owl, frog, cow, bear, etc.). Give them a few seconds to think about their animal sounds and practice them quietly. On signal, everyone makes his animal sound at the same time. Guided only by these sounds, players try to line up in order of biggest to the smallest animal.