We also let our kids (both 11) look around in the shops at their liesure while on ship! The things that they wished to purchase, they made a note of, and when we met up with them, we would go to the shops and let them charge it to their cards! We were with them when they used their room key charge priveledges, and it worked out extremely well! It gave them the "cool factor" feel of being able to charge items themselves! They never charged anything when we weren't with them!
