Hi Ladies, I lived In Zurich until May last year with my two children (2.5 and 4). I made wonderful friends with many expats and had a wonderful time with many International Families. I would suggest moving to the " Gold Coast" Zumikon, Kusnacht, Meilen. The schools I would recommend is ISC in Zumikon. They follow the IB Program and EY Program and have a three year old and four year old Kindergarten.
Switzerland is a VERY expensive country to live in, make sure you get a VERY good expat deal. Schooling is £20K per child from 5 years and everything especially food, meat, fruit is quite pricey.
Be careful where you move as when you move into any accommodation even temp. you will need to register at the local council office.Taxes in different areas vary hence many expats move to Zug (a canton near Zurich) that has lower taxes than Zurich. Also there is also a Religion Tax and you will pay tax to a church if you tick that box.
My cousin lives in Zug and her young children go to Zug International School.
I lived in Zollikerberg about 8 kms out of Zurich on the top of the "Gold Coast". Many ex-pats live in large, modern apartments and I suggest you ask your relocation agent to find a place where other expats live or you may have a lonely time as the Swiss are not that interested in meeting expats. Our 3 bedroom apartment was CHF4200 Food was about CHF 250 for a family of four with not much meat or chicken.
See if you can also get German lessons as part of your relocation. My friend has a lady who comes to her house while the kids run around.
Most apartments have communal play areas for the children and its a great way of meeting your neighbours.
Summer is wonderful in Zurich, many surburbs around the lake have wonderful "Badi" which is like a private beach on the lake but is either free or costs a couple of Franks.
Shopping is a pain in the ass but you can always shop online at leshop.ch or I used to get delivery's from Britshop.ch. Clothes are more expensive than London but seem to be better quality.
With young children its easy to love Zurich but your experience will depend on where you live, I know plenty of people in Zurich and meet wonderful friends through the Mums and Toddler group in Zollikon.
Good Luck,
PM me if you want need any details.