During a 4 hour tour it is possible to visit The Hague with the Parliament buildings, the Peace Palace and a must if with children: Madurodam, Holland in miniature. If you prefer culture we could visit the Mauritshuis, the museum with the most famous Vermeer painting: the girl with the pearl earring and many other famous Dutch 17th century paintings.
During an 8 hour tour we can start with the Aalsmeer Flower Auction (only weekdays and you have to get up early!) and in The Hague also visit Panorama of Mesdag, which is a special experience. Lunch can be had in Scheveningen near the beach (fish) or in Delft (poffertjes, small Dutch pancakes). Delft, where the famous painter Vermeer was born and lived his whole life is only 15 kilometers from The Hague.
In Delft we walk through the old centre with the two old churches and the town hall on the market square. Delft is also famous for it's Delft Blue earthenware. From 20 March till 17 May you can include a visit of the Keukenhof (aprox. 2 hours and entrance fee 16 p.p.) .