You can still get involved in the Sea Cycles project.
Here's a pdf file giving ideas to inspire people to create/transform themselves or their wheels into a marine related theme and come along.

SEA CYCLES:
LIVERPOOL’S 4TH PEOPLE POWERED BOAT FLOTILLA
SUNDAY 18 SEPTEMBER.

Departs 11.15am Liverpool World Museum William Brown Street

Free

The Pool Project continues as artist Jean Grant (site-sight) invites participants to celebrate the secret underground tidal pool that flows beneath Liverpool.

A flotilla of DIY craft with a maritime theme will set off from where boats once moored, along Whitechapel and Paradise Street, finishing at the Mersey near the Maritime Museum, reminding us of the Pool’s existence and its importance to the city’s growth and development. This is a great opportunity for everyone to get dressed up, blow bubbles, sing sea shanties and have fun. For information on how to be involved, email aniimac@netbreeze.co.uk or visit website: http://www.poolproject.co.uk/seacycles