Hi, I'm a native Mandarin speaker with two girls 4 yrs and 20 months. We just came back from our one-month/year immersion from China.
I am thinking of organising a Mandarin playgroup at Sat afternoon for my younger girl age(but my older one will be there too!) at home. She's not talking much still at the moment but she understands/responds well to both English and Mandarin.
Let me know if you are interested please.
We live in Clapham South.