It's fortunate that during this trip, we saw two items, which allows me to reinforce two concepts to my sons: pursuit of happiness and pursuit of love.
First photo shows an exhibit in British Museum Chinese gallery - a robe with over 10000 butterflies. Butterfly represents happiness in Chines Daoist world.
Second photo shows the Wall of Love in Paris with over 300 different languages for the word of love.
I took pictures of my sons with these two items and plan to place pictures in their rooms, to remind boys of two of most important things that they will need when they grow up.
Photos from web, not mine.