Helping a baby bird

I was on my way to the court in my park and saw a baby bird on the flower that was lonely and the mother wasn't there for it, I thought 'oh the mother will go and get food and come back to him or her' So I went and played football & basketball with my friends and came back and still found the little bird there so cold and shaking so I eminently held it and ran to my house told my mom my mom came and helped me, we got a cage and baby bird food and water and in the cage we built him a nest and something that he can hide in, a couple days went by and it was okay it eats but it needs help to eat so we bought a baby bird feeder thing and it helped we had him for already a month the bird was happy, not sick so we made him fly away because I don't want it to be in the cage for a long time and I named him Coco.