Taxi fare to the British Museum: Ten Pounds (around 20 dollars)
Entry to British Museum: Free
Lunch at British Museum: Thirteen Pounds (around 26 dollars)
Little Goodies at the British Museum Children's Gift Shop: Six Pounds (around 12 dollars)
Taxi fare home from the British Museum: Twelve Pounds (about 24 dollars)
Not having to take public transportation with three little children all by myself: PRICELESS!