Today is St Nicholas Day - and as you all probably know, he's the one who gave his name to Santa Claus. In the Netherlands he's known as Sinterklaas, and he'll be arriving in towns and villages all over Holland today with his assistant Swarte Piet (Black Peter - who is that colour from climbing up and down chimneys!).
That night Sinterklaas will visit everyone's home and throw presents down the chimney. They will land (magically) into children's shoes, which have been left out to receive them. If any child has been naughty, but managed to escape the switch of twigs, they are more likely to find a raw potato in their shoes!
Unlike Santa Claus, Sinterklaas lives in Spain.