Receding

After taking 7 and 5yo's school - walked home via Goit Stock -the water levels are now receding

Thought my knowledge of school maths had receded - until I found I could contribute to a conversation about decagons - polygons - their angles - and properties with 7yo - not the kind of thing we normally talk about whilst walking to school

H didn't seem to get the joke that a missing parrot could also be called a polygon though