Walkable from Greenwich (maybe not with kids) is Mudchute Farm on the Isle of Dogs.
I love Mudchute Farm.
I'd go Mudchute -> Foot Tunnel -> Maritime Museum/Cutty Sark or something -> Market for snacks and tat -> Old pie shop (can't remember the name) -> Nice pub
Walkable from Greenwich (maybe not with kids) is Mudchute Farm on the Isle of Dogs.
I love Mudchute Farm.
I'd go Mudchute -> Foot Tunnel -> Maritime Museum/Cutty Sark or something -> Market for snacks and tat -> Old pie shop (can't remember the name) -> Nice pub