Site with lots of simple interactives from a variety of subject areas. Science and Math interactives are mostly for secondary students, but some Language Arts and History interactives are for younger students. These would be good for introductions to a unit/lesson or serve as a simple diognostic or review to check for understanding midway through a lesson.
"Kids Play Park is an educational website for kids. We offer a variety of free kids learning games. Kids have fun learning while playing our games! Play kids math games, art games, kids memory games, word games for kids, kids recipes, and the stock market game that teaches kids about stock."
Create digital pop up books online. Books can be embedded on other websites, viewed in 3D or augmented reality mode, and customized using your own images, artwork, and sound (premium version only).
Could be a really nice way for students to publish writing, create digital stories, or create stories to share with digital penpals.