Well, many people who knew the boys when they were young described them as being very 'wild'. They were, as most boys are, very energetic and adventurous, and they liked to do daring things. Though the children did have some discipline, it was very minimal. So the boys were in some ways misbehaved alot. Alix didn't really like the boys being around OTMAA because of their 'wild' tendancies, and of course Alix had sort 'isolated' her children from most of the family members and they rarely saw their cousins.
OTMA didn't particularly like playing with the male cousins because they were so 'wild' but Aleksey loved having boys to play with (though he couldn't do as much as they could due to his illness).