It’s a great area to live with kids. Very friendly community feel, loads to do and all within walking distance. There’s lots of green space - Kew Gardens, Richmond Park, Richmond Green, Marble Hill park etc and lovely walks along the river.
Commuting to Cannon Street is quickest if you get the normal train to Waterloo, the Waterloo and city line to Bank and walk from there. The tube is also a great back up for if the train isn’t running for any reason which is pretty rare.
There is some plane noise but it really varies, literally from street to street. You can look up flight paths online but planes seem to fly in over Kew Gardens, Richmond Green and then down over the A316. The further away from there the less noise. So Richmond Hill area, East Twickenham and the bit of St Margaret’s around Marble Hill Park are okay for noise in my opinion.
Not sure about specific roads in Kew but Kew Gardens has bad plane noise. Something about wide open spaces not having buildings to absorb the noise as well as planes directly overhead according to DH.
Teddington also has a lovely family feel and nice restaurants and Petersham/Ham are quiet and villagey but both have less good transport options.
I would suggest having a drive and walk around the area and see what you think.