1) Pick a good container:
A large, translucent, waterproof plastic container with a latch top or zipper closure can make a good first aid kit. Lunch boxes can also be considered for this purpose.
This kit should be easy to carry, so a handle would be better.
The various items in the tool bag can be organized in a label zipper bag.
Regardless of your container choice, identify it "clearly" by writing a "permanent mark" in multiple locations on multiple sides of the box. So, if the box is red, it will be easier to locate it.
2) Store the first aid kit:
Create a clear, consistent location for your first aid kit. This place should be easily accessible and visible. Let everyone, including children, know the location.
Make sure the children in the house know the location of the toolbox. But for children, using the tool kit is not an easy task.
3) Teach your family members about the kit:
Teach everyone who is old enough to understand the different components of the toolbox.
They should also be taught to call other people if needed and show off their toolkit.
Put a manual in the manual. To maximize, if some of your family members have special medical requirements, write them on a piece of paper and put it in the kit.