My two sons are now 7 and 5. Despite frequently giving me ulcers with their antics, they are generally very well-behaved and good-natured boys.
Granted, the elder one’s moodiness can put a girl to shame, while the younger one’s mischievousness is impossible to tame. But those traits, among many others, are exactly what makes them so much fun to watch and interact with.
That is, of course, until they start interacting with each other!