In Nursery we used BeeBots, which are programmable robots, to knock down the troll from the story ‘The Three Billy Goats Gruff’.  The children had to estimate how far their BeeBot needed to travel in order to hit the troll and could then improve their estimation once they had tried.  The children had to count carefully when using the keys on the BeeBot to make sure the number they programmed matched their estimation.  We moved the troll and the BeeBots around to change the distances to make it more challenging!