Pre-CK mod...

It's a creature named after your son, who follows you around. 

Go to Vault 111 exterior and click on the radstag in console
Use the console command :

For eyebot:

"bat shauneye" 

and again

"bat shauneye" 
--------------------------------------------------------


to get Shaun(the creature)to follow you around. 

Fast travel somewhere for the creature to appear if it isn't there already.

If it still a radstag, click on it and run again. After that it SHOULD be the creature you want.


To load the mod into the game edit this file:

C:\Users\<Your windows user name>\AppData\Local\Fallout4\plugins.txt

...and add Shaun.esp to the list of mods to load. Make sure to mark the file as read-only after you edit it!

or Use a mod manager.