There is sand on many beaches, and if you choose to do so, you can spend hours working with your fingers and some even crude tools in the sand in the process of making sculptures.
The beach can be your canvas and your fingers, your brush. With the nearby sea, you have enough water to give everything shape. Starting with sandcastles and eager to develop you can gradually do bigger and more complex artworks.
Getting encouragement and advice from onlookers, your work hopefully will progress over time. From time to time you certainly have to work on a figure over and over again till it is perfect and if interested you might even take part in important global events. You never know.
Here an artist near Chowpatty at work with basic tools.