Traditionally, a friend of the family came to play the "trekzak", he played all the Sinterklaas songs the kids know, so the atmosphere was OK.
Sinterklaas showed up and spent some quality time with all the kids in the family. Thely were all individualy seen by Sinterklaas and they all got a small present and some pepernoten (traditional ginger cookies).
And after Sinterklaas left, the Zwarte Pieten left a big bag with presents, so the pater familias, my FIL, presented the presents to all the kids in our family. Great fun, great food, a great night.