My DS - 4yo - has recently gotten into this new habit of boasting to his 2 yo sister....
"I have the biggest (croissant for example)"
"I am going to the shop and not you"
They get on fairly well (right now playing nicely together) but he must be the first, have the biggest, be the only who can..... and brag about it - SIGH!!!!!
Any tip?????
Tight now my way of dealing with it is to say for example
"I am going to the shop with mummy and not you" (to DD)
"DS stop it or you're not coming with me.... "
Not sure it's the best way.... I then try to say that boasting is not nice....