Remaking a Children's Chair

I need to redo a child's chair. I want to do better than the normal ones. What to do with the purpose of helping the children, my ideas are to add some small stairs so that the children can climb on their own to sit and also add a harness so that the children are safer since most children cannot It is still and the parents will be more comfortable and will not be watching their children so that they do not fall.

These are one of the printers that I could use to do it since I want to do the plastic thing and it could help me more but my purpose is for it to be very resistant.

This is the first step I did is to design it well with the exact measurements and it will fit me very well and make sure I don't have any problems later.

This is the second step that I did is to design in 3D so that you could see how the chair was going to look, you had to cut it with exact measurements.

This is the third step in that step I had to add the ladder so that the children can climb on their own in that step I had to add it because it made it easier for me

This is the fourth step that I did is to add the little table for the children where they have to put their meals or something that they have to put on the chair. It will have an side where the table can be moved when the children have finished eating.

This is the last step, this is how the children's chair would look when you look at the final design. I designed it with the purpose of helping children.