Electric scooter vs bicycle in 2015, kid in tow?

I used to scoot my son to school, each of us on separate push (not electric) scooters - they make big ones for grown ups. Then we'd lock his up at school and I'd take mine on the bus to work. He's grown out of his now, but I still ride mine to yoga...

I have an electric bike and its great. Best of both worlds. You can even get an electric folding bike which you could take on the bus! Child seat on the back. The electric bike is fantasic for helping with the load - as she has gotten heavier, its been a godsend.

I think a bicycle would be more than adequate. Just a regular bicycle! With the 6km, though, would you ride to the preschool, ride home, then ride back to the preschool and ride home when it was time to pick her up? Or would you take the bus or something onward from the preschool? Two 6km trips is probably the ideal bicycle commute; four is doable but would be difficult at first. The 2km to the bus stop you could easily do four times a day on a regular bicycle, though. A few questions to consider: Would you put the bike on the bus, or would you leave it at the preschool/bus stop? Do the buses have front racks that you can fit a regular bike on (these are terrifying to use the first time, but then become very easy), or would you need to have a folding bike? If you leave it at the preschool is there a secure place for you to leave it? Is the 6km hilly at all or is the weather often bad? Where I am (Northeast US), children riding in bicycle seats pretty much always have helmets on (I think it's required by law), and kids using scooters generally use them as well, even just little kick scooters. I almost always wear a helmet when on a bike myself; probably 75% of adults wear helmets around here. Here's an article on http://chicargobike.blogspot.com/2011/01/carrying-kids-on-folding-bikes.html... looks like it's possible, though not perhaps easy. You can tow a trailer behind a folding bike as well. At the elementary school I pass on the way to work, there's always a trailer locked up outside - presumably the parent rides the kids to school, locks up the trailer, then continues on his/her way on the bicycle.

We have a 4 km commute to daycare that we often take on foot or bike. We don't have anything electric but I can speak to some other options. Seat on a bike: most have weight limits of under about 15kg--you don't mention your child's age but my big kid sized out early. We used a bike trailer until our son was 3--one of us would ride him in, leave the trailer at school, and the other parent would pick him up at the end of the day. Most of them have hardware that can be bought for extra bikes and some kind of easy on/off linkage. I imagine you could use it with a folding bike, though I don't have one. Now that he's bigger we have a http://rideweehoo.com and adore it. You may be able to lock up some or all of this at school so you can take the bus the rest of the way; we sometimes do this. Sometimes we walk in and my son rides a balance bike. He's also got a friend with a kick scooter that amounts to the same thing. They dawdle a lot less when they have a toy to ride on. That may not work so well if the sidewalk has a lot of pedestrians. We always use a helmet, but it's the law around here. You could ride one of these to the bus stop and carry it to school.