taking your children to covent garden flower market is a wonderful experience.
i used to take my daughter, starting @ age four, to buy our christmas decorations every year - her birthday is christmas eve. i would go back later to buy the "santa surprise" christmas tree, and on the night before her birthday we always slept under the tree.
we always went at easter so we could fill the house with tulips. to this day
(she will be 28 this year) she fondly remembers those trips, the hot chocolate and the bacon butties.
the vendors there were always wonderful - enjoy!