You pick them up at Schiphol Airport, drive them past the flower fields where all the tulips are blooming and take them to Madurodam.
You take them to Amsterdam, visit the Van Gogh museum, introduce them to FEBO, watch them eat special muffins and smoke in a coffeeshop, get on a canal boat with them while they're still under the influence, take them to the Anne Frank House after the effects wear off, eat falafel, spend a few hours in the famous Gollem beercafe and walk through the red light district
You drive to Limburg, get stuck in a traffic jam, let them help with removing all junk from grandpa's workshop, have them eat grandma's soup, dutch hot sausage rolls and home made beef salad (Huzarensalade), drive them back home so they can freshen up when all work is done, then get them to Delft for a Medieval dinner with lots of food, drink and merriment.
Take them to the Efteling all day. Make them cook you dinner.
Put them on the train to their next location. Be braindead for the rest of the day.
Gods, we had fun though.....