Work in a well ventilated area or outside.
Choose a safe campfire site, away from overhanging branches, dry grass and anything flammable, and set out water or sand, a first aid kit and seating.
Visit your sit spot, or spend some quiet time in a natural space you know well.
Think of two or three people who might enjoy spending time in nature with you, such as friends, family or neighbours.
Carefully split the wood lengthways down the middle, creating two even halves, which will form the top and bottom of your kazoo.
Invite the group to develop their own wild communication code, explaining that it needs to be subtle enough that people nearby will not realise it is a signal.
Gather the group somewhere with plenty of bird activity, such as a park, woodland, meadow or waterside.
Position the group some distance from a hedgerow, far enough that watching from there does not disturb the birds along it.
Place your tinder bundle where the fire will be located.
A stealthy fire is a small fire that gives warmth or cooks food with very little smoke or glow.