Just a little trivia:
Even if a ghostly/supernatural entity isn't particularly malicious, letting children interact with them is still ill advised, for two main reasons.
1- If for any reason, someone tries to interfere with their interactions, even if the entity doesn't harm the child, it'll harm (or even kill) the one interfering, or even consider the interference an act of betrayal from the child and attack them too;
2- As portrayed, the child comes and goes freely, but in time, the entity may grow attached and decide to one day just not let the child leave anymore (in fear of the child not coming back anymore).
Remember kids, supernatural entities are very volatile, if you encounter one, please contact the adequate authorities, in accordance to your belief system, or the responsible government branches.