Meet Ava, a 13-year-old inventor. Her main idea was to create a machine to clean the oceans and save marine life. She faced numerous challenges - finding materials, designing the machine, and testing it. Still, she didn't give up. She learned from her failures and improved her invention. Soon, the 'Sea Cleaner 3000' was ready and it was a success! It cleared trash from the local beach, saved marine life, and inspired her community to be more eco-conscious. This was the theme of Ava's journey - perseverance in the face of obstacles and the importance of caring for our environment. 'Every big journey begins with a main idea and is guided by a theme. My idea was the 'Sea Cleaner 3000' and my theme was environmental preservation,' Ava explained to her little brother. Ava's journey showed that a single idea can make a big difference.