Come and celebrate the new entrances to Paterson Park created by young people last summer.
Pupils from City of London Academy helped to create the new sculpture.
Local blacksmith Kevin Boys set up a mobile forge in the school yard where all participants had an opportunity to twist and turn the iron bars into butterflies and bees.
All the elements created will form part of a larger artwork at the entrances to the park.
Help to plant a hedgerow as part of the BBC Tree O'Clock world record attempt.
All ages welcome; wear appropriate clothing.
For more information please contact Agnese Appleby on 020 7525 0895.