I've never been one to believe that children are resilient. To me, resiliency means being able to "bounce back" and carry on, no worse from the wear. I think children are malleable, pliable--they don't "bounce", they are shaped and molded. Once they break, they may be lucky enough to heal, but the scars are still there (seen and unseen). As with anything pliable, given enough time, they will harden and callous. It's my opinion that as adults were are not "less resilient" but rather less malleable and more hardened to the circumstances we are dealt. Experience made us durable and rigid.
What helps? We've learned to duck!