Murders in Childhood

When I was a kid, I've killed many Frogs and one innocent Insect. The insect was drowning in water. Instead of saving it, I killed it throwing a stone on his head. I've done these sins near about age 8-10. I did know about what is good and bad. I used to go with my elder sister and murder Frogs for fun. I murdered the insect for damn fun only. My best friend was saying not to murder the insect, but...I :( I've also killed many Ants either deliberately or accidentally. I forgive for these sins I've done before all human Gods...