First runner-up went to Trisha Vamsikrish, 11, from SK Mutiara, while Ira Elise Lajium, 11, also from SK Mutiara, was second runner-up.
Chong, Trisha and Ira won RM500, RM300 and RM100, respectively, apart from a trophy and a certificate each.
Meanwhile, Mohammad Irshad Elahee, 12, of SK Sri Gaya, Visalan Roshan, 11, of SRK Sacred Heart, and Anagha Anil, 11, from Stepping Stones Jaya Learning Centre, won the outstanding prizes of RM50 each.
A total of 28 children aged between 9 and 12 from 13 local and international schools here participated in the event held at the Sabah State Library, here, Saturday.
SIKK President Audrey Fung said they were delighted to hear all the children's speeches.
"The children have worked very hard but credit must also be given to their parents and teachers who have encouraged and guided them," she said.
Fung said a key objective of organising the event was the learning process that both children and parents had to go through together in researching and preparing for their speech.
"A child may have all the ideas but it is only with the parents and teachers' guidance and encouragement can the speech be fine-tuned until it becomes more focused and effective. In the same way, saving the environment is essentially teamwork. One person can't do much but together we can save the world.
"Likewise, SIKK may be the organiser but this event would not have been possible without the cooperation and expertise of our esteemed judges, partners and the generous contributions of all our sponsors.
We are very grateful," she said.
Fung said Soroptimist International (SI) is a global volunteer movement working together to transform the lives of women and girls.
"SI members work in a variety of occupations but we use our professional expertise and diverse talents to help others work for social change.
Hence, the spirit of Soroptimism is working synergistically.
Combining our different talents and whatever time, we have for a better tomorrow," she said.