For the first several years (here in Silicon Valley, CA) my kids had little to no content in their school bags (grades K-4). Then they had some stuff and we th

For the first several years (here in Silicon Valley, CA) my kids had little to no content in their school bags (grades K-4). Then they had some stuff and we thought it'd be best if they got roller bags. Now they're in middle school and the roller bags are full and weigh 10kg+ it seems. Insane. I want them to ride their bikes to school but with this weight it would only happen with rear-racks and panniers. Sigh.