Came across this a few years ago by chance as you do on a bike after an interesting bike visit to a nearby interesting church with an interesting nun*
Passed more recently after a bike ride with some nice folks - Poplar East London.
in fact from close reading of that wiki below the memorial in a very humble bit of London, until very recently much more humble, has almost certainly been upgraded from Grade 2 to Grade2* since I first encountered it.
My memory was a bit faulty though - I had the idea that the bomb had been dropped from a Zeppelin.
The children are named on the side - mostly around 5 years old.
RIP.
Under that close-up inscription it says paid for by public subscription.
Wiki on:
https://en.wikipedia.org/wiki/Poplar_Recreation_Ground_Memorial
* pic of church and nun tale may follow when next that way.
Do stop to check out anything even vaguely interesting you see on a bike folks - car drivers just dash/drift on by.