Not as easy as crayola. All of my daughter's crayons are still in one piece (perhaps being triangular shaped gives them some extra strength?). I hadn't noticed this feature until prompted with the question, but I think they're great crayons and we don't have a single broken one!
No, they aren't. I was surprised. They fall on our hardwood floor all the time without breaking, unlike the Crayola triangular crayons. We did end up with some broken ones, but I'm pretty sure it was the result of a tantrum.
I dropped one on our Marmoleum floor this week and broke it in half. To be fair, these crayons have dropped and thrown several times on our hard floors and carpets so it was probably weak from the wear already.