How do I make a closet tunnel to connect twin girls' rooms?

Riv5569883
by Riv5569883
I'd like to safely create a secret passageway (tunnel) by cutting a hole in the closet wall. This wall is the only wall that separates my twin girls' bedrooms. Is there anything I need to do to make sure this hole is structurally safe?

Thanks for any and all input,
Lisa

  7 answers