One thing I noticed on school was the smallest kids demolishing most. Grown-ups would have quite a job ruining the tricyles we had without tools, but it seemed no challenge for a group of 4-6 year olds 
The "vandalism" of the older kids was often more a matter of abreaction, stuffing toilets with toiletpaper, writing stuff on walls etcetera. I'd guess they be more cautious with their own stuff.
Not having kids myself I must say I miss those little rascals, it was a great job.