vulnerable. we're talking, of course, about the children of haiti. tens of thousands of boys and girls who are in desperate need of help. many are orphans, all are survivors of a nightmare that may stay with them for the rest of their lives. that's why unicef has therapists on the ground to talk to the kids, to try to comfort them. ivan watson reports. ♪ >> reporter: a song and a dance for children who have witnessed unspeakable horrors. these are child survivors of the earthquake, who now laugh and clap as a child psychologist leads them through the hatian hokey pokey. francois calls this therapy. [ speaking foreign language ] >> reporter: francois is part of a team of hatian social workers