North West is to have ''big sister classes'' at $300 a session.

Kanye West and Kim Kardashian West are keen for their 23-month-old daughter to adjust well when they welcome their second child into the world in December so have arranged for her to have coaching with an expert on how to prepare for sharing her parents' attention and affection.

A source said: ''Kim has signed Nori up to big sister classes. She will have one-on-one sessions, as well as group classes.

''Part of the sessions will involve playing with dolls.''

While many new parents save cash by using their first child's clothes again, the 'All Day' rapper is insisting on a brand new designer wardrobe for their second baby because he doesn't want the tot to develop an ''inferiority complex''.

The source told heat magazine: ''Kanye is refusing to let the baby wear North's clothes in case it gets an inferiority complex. He's planning to drop about $1.5 million on designer threads.''

And as well as splashing out on a new wardrobe, the 37-year-old musician is said to be ''scouring the world'' for the perfect nursery furniture.

The source said: ''He's completely overhauling a guest room and turning it into a nursery. He's set a budget of $1 million for the room and furnishings.''