You can go a long way with charm and Hugh Hughes has it to burn. It is hard to take your eyes off this smiley Welshman as he regales the audience with his delightful shaggy dog story about the island of Anglesey sailing off into the Atlantic.

Floating is a vivid comic tale about making connections and how imagination can shift realities. When not playing word games Hughes (actually writer Shon Dale-Jones) sprints around, pretending he is on a bridge here, creating a micro-earthquake by shattering a teacup there.

Despite quotes from Primo Levi, the emphasis is on whimsey, with an engaging DIY streak redolent of stand-up Josie Long. Numerous laughs are elicited from a tatty cardboard synopsis and later, while re-enacting a swim, our hero dons a flimsy harness of oranges - to protect him from drowning and scurvy.

Strong support comes from Sioned Rowlands, who works frenetically as every supporting character and deserves an award for repeatedly dunking her head in a bowl of water to symbolise Hughes's breaststrokes.

All this plus some non-aggressive audience participation makes Floating a small, but beautifully formed gem.

Until 30 June. (0845 120 7550, www.barbican.org.uk).