Developing a Script
Once you have a ton of ideas, you'll have a stack of index cards and will need to organize your story so that you know, beat for beat, the exact sequence of events, including the ending. Let's take the idea of the adult who can't open the childproof bottle. Getting to the contents of the bottle is the adult's motivation; the complex cap is the obstacle. Pretty simple story.
Fleshing it out, the adult could use all sorts of wild schemes to get the cap off: a can opener, a blowtorch, dynamite. If other characters, such as a kid, a dog, and a hamster manage to open it with no help, it can just serve to humiliate the adult and strengthen his motivation.
All of these conflicts need to build to an ending as well. The ending could be simple, with the adult driving himself crazy with frustration. It could be ironiche finally opens the bottle, only to find it empty.
As you finalize the structure of your story, you will also need to be writing a script. This could be as simple as a point-by-point outline of the action, to a full script with dialogue and screen direction.