Most Manx are happy to entertain themselves most of the time but not these three. I guess I was not a very good mom cat. Deborah Feldham of Glendoveer's Abyssinians had a similar story. They were not easy kittens to work with. They were jealous and insecure, often showing their insecurities by going to the bathroom in inappropriate places and scratching or hissing at strangers.
Kittens learn from mothers, littermates and their surroundings.
Kittens need the time with their mothers and siblings to learn important life lessons - lessons that will make them happy, healthy, confident kittens. They learn proper acceptable play behavior from both mother and siblings. Kittens taken away too young are not as tolerant or as sure of themselves as older kittens. Properly handled and socialized by people, these kittens have learned to explore their world and will meet it with a happy, outgoing confidence that will carry them throughout their lifetime. This may vary from cat to cat, or breed to breed.