An abundance of caution

I didn’t worry when I found the first ones.
The heads I mean.
I thought it might be an accident. But then
I noticed the careful arrangement
the tilt the balance, nothing out of place
just minus their heads.
Lego, soft toys, all toys
then my mum's knick-knacks
then the crossing out of heads
in colouring books.
That’s when I decided against
getting a pet, began
hiding sharp implements
had a word with the nursery