How easily do these break?

...I am being asked this all the time. Well, long story short is: a cork board with lots of beads on cards, pinned to the board, was left on top of my car (do not ask) and I have driven off without noticing. Several days later a very nice gentleman returned the board with all the work. We have estimated the pieces got driven over by cars probably several times, and guess what: count of broken beads is TWO. TWO. I can confidently say my work is very well made, sturdy. I have proof.