We all know that every little detail of this isn't true. So here's a few details that our nativity sets on the table top leave out.
1. Jesus was probably born in the fall, not the winter
2. There was no room at the inn because in the autumn the jews would travel to Jerusalem to observe God's Holy Days (this still goes on today)
3. Jesus was about 2 years old when the wise men saw him
4. Jesus wasn't necessarily born in a stable, the Bible only says he was laid in a manger (which if you ask me probably means he was born in a stable)