Glogster seems to be an awesome way to present information. It appears very user friendly and would be engaging for the students. It's sort of like scrapbooking in that you can rearrage your information as needed. In making a poster, once you write thats it. You are stuck with what you have....no changes can be made without starting all over.
Voice Thread confused me a bit. I don't believe that the video really gave a good advertisement of what can be created with the website. I do however appreciate the "educator controls" that have been placed on the use of the site. I ( and I'm sure parents would too) feel much safer knowing that not everyone on the web could view the students work.
Animoto is cool...but I don't see any science educational use with. I see students getting pictures off the internet, but not really apply information.
Bookr - This would be great for a review or even a presentation for kids. Finding appropriate pictures and adding the text to go with it. I tried one on my own, but honestly...its too hot to sit in my livingroom with my computer on my lap and complete it. I'm starting to sweat... Turn the fan up!