A free playful space for under-fives and their families at London's Barbican Centre. Does not require booking. 

A freestanding cube unpacks to become a selection of blocks made out of all sorts of materials that young children can use to shape the space around them in a sensory adventure. Popping up in the foyer on Level G and is produced by Pop up Parks and Co-DB in collaboration with Barbican Guildhall Creative Learning.