I think age 10 is way too young for a child to be making decisions like this.

A British judge has granted a 10-year-old girl's request to be baptized a Christian, even though her Jewish mother wants her to wait until she is older, The Times reported.

In the main body of the ruling, Judge John Platt said that both the child’s parents were Jewish. After their divorce in 2010, they agreed a shared parenting arrangement for their two children. The father then converted to Christianity.

A short while later, the daughter decided she wanted to follow in her father's footsteps and become a Christian as well. Her mother believes she is too young to make such an important decision in her life and that this should wait until she reached the age of 16...
source: http://www.ynetnews.com/articles/0,7...264078,00.html