Prepositions? What's that now?

Recent dialogues often heard at home these days:

Pranav: "I am going in the childcare, mummy"
Mummy: "I am going TO the childcare, Pranav"
Pranav: "I going TO... in the childcare"

Pranav: "I sitting in the bench, mummy"
Mummy: "I AM sitting ON the bench, Pranav"
Pranav: "I AM ... I sitting ON... in the bench"

Pranav: "R is for Rain, falling in the overhead"
Mummy: "R is for rain, falling FROM overhead"
Pranav: "R is for rain, falling in FROM over..over fed"

You get the idea. Basically, we have done away with the need for more than one preposition in the English language.