Abigail is 4 - note that, 4; it's relevant. She's our oldest grandchild and a darling, like the other two. She's bright as a button and sharp as a razor, and has just started school. So Rachel, her Mum, decided to do some fractions with her.
Picture the scene, will you. Mummy and Abigail, book open at a page showing a farmer with his sheep.
Mummy: Here's the farmer with four sheep.
Abigail: Yes, Mummy.
Mummy: Now, if he divides those sheep in two, what has he got?
Abigail: Four dead sheep, Mummy.