Aero plane vapor trails

Encourage your child to look out for these trails in the sky. What does he think has caused them? Notice that they are only visible against a blue sky. Look out for the various different shapes of these vapors trails- some thin straight lines, directly behind aircraft, some water wider trails, as they later spread out and others which are blown into beautiful shapes, resembling ferns, as the wind catches the trail. Notice how the blue sky is often cut dramatically in two by these white areas.
Encourage your child to use his imagination to tell you what shapes the aeroplanes have drawn in the sky - the more fantastic the better!