re: tantrums
iso, regarding yr nephew.. the probable reason on the frequent tantrums could be he's not getting enough attention, so he keeps having tantrums so that someone reacts to him.. if yr ILs screams at him, that could also be a reason for his frequent tantrums.. his frequent tantrums could have been developed over sometime already.. it will need quite a bit of work to correct him..
the reason on why he keeps doing things that people don't want him to do:
imagine this, everytime u touch the tv remote, someone gives u a reaction. everytime u touch yr book, no one reacts. in the eyes of a toddler, which will u touch? tv remote or book? toddler will touch tv remote because there's a reaction! don't forget that they will test u.. first time, they touch, u react.. next few times, also react.. so they will keep touching..
using method of ignoring: u ignore him when he touches remote, after a while, he realises no reaction when he touches remote, he will stop touching remote.. however, if u don't want him to touch the remote, pls remove it so that he can't access to it!
So, ur ILs could be reacting to all the wrong things, leading to the toddler touching all the wrong things!
on the other hand, if everytime the toddler touches the book, u react, u praise, u read n interact w him.. he gets engaged (this also depends on child's interest), and next time, he will start pointing to the book and want u to read to him..
regarding imitation.. tough one.. probable reason why yr nephew kept quiet because he had never gotten such a reaction in return before, so he kept quiet and observe you.. HOWEVER, i think prolong usage of this method doesn't resolve the root cause of the tantrum and might lead him to think that i touch this, i react like tat, auntie touch also react like tat, so it's ok to do tat! so next few times, he might just continue to do tat!
esther, they won't understand the preaching, but they will understand through the tone used..
the degree of tantrum also depends on child's individual temperament.. adults must be good role models as children model after us.. however i strongly believe that kids with bad temperament can be nurtured as well.. so never give up on yr kid.. also reflect upon yrself first on why yr kid is acting in certain ways before jumping to conclusions that he's naughty.. afterall they are still exploring.. only 13 months of life experiences!