Could you please crrect these sentenses?

A splenddid environmental work camp opened last December 28 2019 at Cordova, Cebu. 3 Japanese volunteers and a Philipino gathered to dedicate their time to volunteer work. During the camp they picked up garbages on Barangay and coastal with local people. They also exchange each others culture thorough playing the game with children. Finally, they realized how important to start small thing that we can do.

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A splendid environmental work camp has been held last December 28, 2019 at Cordova, Cebu, Philippines. There were four volunteers. Three of them are Japanese and the other one is Filipino. They gathered to dedicate their time for the volunteer work. During the camp, they picked up garbages on the Barangay and also along the coastal with local people. They also showed and exchanged with each other their different culture through playing various games with the children. Finally, they realized how important to start small thing that we/all of us can do.