I know that until their teething stops puppies can be a nightmare, not all go through it but if they do it's a pain literally.
My advice would be to explain to your son, (not sure how old he is) that if the puppy comes running after him he must stand still, as the first instinct to your child is to naturally run away, this then makes it a game to your puppy, like a human tug of war. The frozen kong is a great idea and if he starts to mouth or bite put something in his mouth, teach him to carry something then he quite simply can't nip. The shaking of the scruff is another good thing to do but where children are involved it's difficult because the person he is biting should do it, still do it yourself and put him in timeout but it is hard as you can't be there all the time.
Karen is right he is full of energy and needs tiring out, get him out and about wear him out so he sleeps and when he wakes and looks to play, play structured games with him.
A bored Munsterlander is a destructive Munsterlander.
Play games such as Hide and seek. You can play this in the house or garden. Start by leaving your dog in one room and hiding his favourite toy in another room. The first few times you may need to help him find his toy, but Munster’s catch on very quickly it wont be long before they know exactly what’s on and you will have to find harder hiding places.
If you play outside drag the toy over the ground to leave a scent for him to follow, Munsterlanders use their noses all the time! You can also play this out on a walk, one of you walks with the dog whilst another member hides in the woods, and then send them to find Mum or whoever is hiding, they love it! Lots of praise when they find it!
Avoid games that can:
Get your dog overexcited to the point of being out of control
Involves using you as a toy
Involves encouraging your dog to put his teeth on your body or clothes.
Involves wrestling or allowing your dog to pit his wits against you and even win.
Encourage your dog to exhibit behaviour that might be acceptable as a puppy but could get your dog into trouble when he is no longer a puppy.
Any corrections must be:
a:) Timed correctly to occur at the actual time of the offence.
b:) Effective enough for your puppy to learn from it.
C:) Designed to correct not punish
The Correction must be immediately followed by praise, because when you have released your puppy from shaking him, she will no longer be doing what she was doing a moment before. She will be thinking of you and whenever she concentrates on you she must be praised for it. She will quickly learn to associate paying you attention with praise from you. Your praise must be lavish to be effective, and leave your puppy in no doubt that you are pleased with her. Everyone in the family must use the same method of training and commands.
I always show all my puppy owners how to roll the puppy onto his back and hold him there, the reason for this is to become dominant over your puppy without having to have a huge battle. If he struggles or argues to get up stick with it, you must only let him up once he has looked you in the eye and relaxed, if you do this every day he will learn who boss is very quickly, once he has do it weekly and then a little less often unless you need to of course.
Let us know how you get on wont you.
