I'm really looking forward to fall when my 5 yr old starts K and commutes w/ her brother (who will be in 4th grade) rather than going to preschool 4 miles the other way. It'll be the first time they share a destination since that brief shining moment before he started K, 4 yrs ago, when I put them both in the trailer for their daycare.
She came in 2nd on our bike-to-work month team, 230 miles in May between the trailer and trail-a-bike.