The small growl box measures 48x50cm. It is made from natural materials and operates without a battery. The 'growl' noise is made with the help of gravity (when you tip it upside down) and air forced through reeds. We have recently used these as part of a lovely needle felting project of Hetty the Herdwick. You can buy the kit here and you can also book onto a virtual workshop making a large jointed bear (all needle felted) here.