I used to have no worries about my kids playing in the street here (Norway), but I've noticed a few of these big trucks lately – I cannot understand how their drivers can be able to see a five year old running around it?

The five year old just needs to stay at least 2.5m [1] away from the driver and there aren't any problems!

[1]: Based on the chart in this old meme https://old.reddit.com/r/fuckcars/comments/140dgn8/many_popu...

They can't.