Learning numbers inside the lift

Mommy just noticed recently that he liked to see the red numbering in the lift.
Luckily our flat was in 17th floor, so it's the opportunity to teach him some numbers since he has interest in that.
Every time we go down or up, he will look up the red numbering and mommy will say it loudly the numbers.

Sometimes, it's fun to learn this way instead of telling him the number in the book