All the answers say that weight lifting doesn't stunt the growth, but for the kids who start weight lifting at a prebubertal age, and they go through puberty, does this stunt their growth?
When you say "stunt your growth", you're referring to the fracturing of epiphyseal (growth) plates.
Now, repeat after me:
Growth plate fractures only happen due to improper technique and/or excessive load.
No kid will stunt his growth because he chose to start lifting some weights, as long as he does it correctly.
The idea that lifting heavy stuff "squishes" you and keeps you short is about as logically sound as the earth being flat. It has about the same amount of evidence, anyways.