I threw away a lot of artwork that my kids did when they were little.
 i can imagine how they felt
It seemed they mass produced art in preschool and elementary school.  They would come home with scribbled on paper, swirls of fingerpaint, things covered in construction paper.  It was ALOT
i hope they didn't get mad at you, some  things like are so precious 
Well I did it secretly over the years.  I picked out some of my favorites and tucked them away in a box.  We just found them and it was fun to look at the stuff.