Another workaround would be to save the game, exit to the menu, then reload the save. You have to create a new file in order to get him to move.
He reads his wife's favorite Bible verse, Revelation 21:6, to the Lone Wanderer. James will come back into the room, aware of the player character's "escape" (even if they return to the pen and close the door). If one is not satisfied with and wishes to change their SPECIAL stats, they will be given a final opportunity to do so after the " Escape!" quest. The last page allows for all statistics to be adjusted from one location. The book gives a description of what each attribute does on each page. Once examined, the player character is prompted to decide what their initial primary statistics should be. The next objective is to find the " You're SPECIAL!" book which is lying right in front of the toy box.
Approaching the chair next to the playpen will prompt a quick tip on how to jump.
This is also when one learns how to grab and move objects without adding it in the inventory. The gate will swing open and the next part will start. A new objective is given at this point: open the playpen's gate. After the player character's father, James, speaks for a short while, he will lock them in the playpen and leave.