Henry comes into the living room to find a line of cars, buses and taxis perched on the second shelf of the bookcase, two feet off the ground. He notices a second line of vehicles on the coffee table, pointing in the opposite direction.
Yesterday we took a trip into London to spend time by the river and crossed several bridges. On holiday in France last week we saw a famous aqueduct. Henry would like to visit Tower Bridge next. He's desperate to see it open for a boat to pass through.
On the floor between the two sets of toys lies a pile of blocks, alongside postcards of London bridges, a map of the city and the Tower Bridge snow globe we bought on our outing.
This is the provocation.
Henry likes bridges and we want to deepen his understanding of their construction. But he has to work it out for himself.
He doesn't have enough blocks to span the gap. He will have to use his imagination to find other materials that will do the job. And knowing Henry, we expect that halfway through the construction he will suddenly decide to convert it into Tower Bridge, with a road that can be raised up. He knows where the craft materials are kept and we've made sure that it's stocked up with card, string and sellotape, ready when he needs it.
Perhaps he won't even make a bridge at all. That's just one of many directions his play might take.
Of course, a provocation can be much simpler. A tray full of natural materials, a pile of leaves and some PVA glue, a bag full of objects that are all one colour or a jar full of buttons.
All you can do is take your child's interests as a starting point and leave them to it. As ever, it's the process, not the outcome that's important.
With each provocation, Henry is learning to look at the world in a new way. His assumptions are challenged and he learns to see more clearly.
What provocation could you offer your child today?
Note: The term 'provocation' comes from the pre-schools of Reggio Emilia, famous for their enlightened approach to early years education. Indeed, the '100' in One Hundred Toys was inspired by Reggio's idea of 'the 100 languages of children', a subject we will return to in the coming weeks.