Depends on if you have sole custody if not you are breaking the law greatly, don't do it unless you have sole custody or get sole guardians permission or a court grant to have custody for a period of time.
Yes, taking a child across state lines without permission from the custodial parent or legal guardian can be considered kidnapping under federal law.
NO!
no
Yes.
Yes they can.
All children have parents
How long can a parent go without seeing a child before its considered abandonment in the state of Pennsylvania
That is dependent of custody orders, but even without, the other parent could file an injunction.
Even without a specific law, or provision in a custody order, the parent should seek the permission of the other parent, and the court, to avoid the filing of an injunction ordering the child being returned to the state. See related link
No, you will need the other parents and the courts permission.
In the state of Oklahoma, if the child is a witness to a crime, then YES Law Enforcement may question a child. If the Child is a suspect in a crime then not without a parent or guardian or an attorney.
Not without the consent of the non-custodial parent ! The other parent has a right to know who their child has been left with (and perhaps would take the child themselves as a better guardian).