Why is everyone at the zoo?

Why aren't all the other kids at school?  What are they doing at the zoo?  Oh.  An inset day.  People everywhere, no chance of getting into the play centre.  Not what I had intended!
Never mind.  Fred, Betsy and Meg had a blast in the playground instead, and zoomed around the discovery centre.  We saw the elephants on their daily walk, camels scowling at cars, and the flamingos in their bright pink plumage.  And Meg asked to go in the wrap, yay!