GOLDEN SUNRISE
Good that your son asked for VK. He can also wear it during the daytime to have more benefits not only at night.
As of now you should not think of outgrowing the size of VK with his age. You can be in present moment and think you can teach him use and explore VK to the fullest. VK children explore VK in many creative ways. And i am sure he will surprise you with his ways of using VK. He can participateon this forum too. We have one more teenager from UK on this forum.
Regarding energy with multiple VK…please check the article on BOOST method.
Pasting a paragraph for you….with 2 VKs the energy goes more than twice.
HOW DOES THIS BOOSTING HAPPEN WITH MULTIPLE VK
Suppose VK decides based on its wisdom to boost your healing by 2 times, being the best for you at that time.
So energy created by 1st VK is said “X amount”
By Second VK, the energy created would be double of X “2X” + “X” of 1st VK
By Third VK, the energy created would be double of 3X that is “6X”
By Fourth VK, the energy created would be double of “6X” ie “12 X”
So the total energy would be much higher than using only one VK.
@"Sonia – Supportive VK Teacher" has given you examples of how multiple VKs can be explored.
You can share your experiences too with multiple VK BOOST method to motivate others.
https://www.litairian.com/innovative-ways-boost-manifestation/