The document discusses three Web 2.0 tools that can be used in elementary classrooms to engage students in writing and collaboration. "Bubble-Mind" is a pre-writing tool that helps students organize their thoughts on topics in different subject areas. "Voki" allows students to create animated avatars that can tell stories, such as about famous historical figures. "writewith" is an online word processing tool that allows groups of students to collaboratively write and edit documents together from different locations.