I just got my boys, for the first time ever, personalized tags and collars.
You know whats so funny? They love them! So they only wear them when they go outside the house with me (outside the property I should say) and I don't attach a leash to them.
The only thing I want to mention is, Don't leave 'the kids' home alone unattended with their collars on. They could get hung up or caught on something and choke.