My wife is out of commission (knee surgery) so I've been biking with the kids to school and then driving to work (if I'm working that day).
The 6-year old is building confidence with riding in the city...back and forth over the Burrard Bridge/Cornwall/etc. as well as confidence in his ability to make it up hills (Cypress/Thurlow/Hornby, etc). It's awesome to see. His Monsters Inc backpack with the eyeball on it means nobody can sneak up on him from behind...