book bags were popular, but haven't in the recent years...or thats my guess by following my sister's fashion timeline. I've used a messenger bag since ever.

And I seriously cannot comprehend why people ridicule over something like LEGO or whatever else...I think a lot of what 'mature' people do are like is rather silly.

Same here. Lego is and will be one of the greatest things ever ^^ I don't plan on quitting.

I don't know. Back in pre-school we had these boxy backpacks. Then everbody got into skateboards and only wore baggy-pants and rucksacks that were either totally out of shape or made for outdoor sports and with straps for the board. And then normal backpacks came back along with messenger bags. Of which I use one too. It will be replaced by a backpack in March though ^^