A 17-year-old male arrested on Sunday, 4 August after a boy aged 6 was seriously injured at the Tate Modern has been charged with attempted murder.
He will appear before Bromley Youth Court at 1000hrs on Tuesday, 6 August.
Police are continuing to appeal for further witnesses to come forward.
The injured boy remains in a stable, but critical condition in hospital with his family, who continue to be supported by officers.
Anyone with information is asked to contact the incident room on 0208 721 4868 or @MetCC quoting CAD 4660/4August.
You can also contact Crimestoppers 100% anonymously on 0800 555 111.