This is a fun and engaging way to use arrays to lay the framework for multiplication. It also takes the skills of arrays and pushes them further in challenging students in their practice of practical multiplication.
There is a home page filled with 25 moons. Students drag and place a star on their moon of choice. When they then touch the moon it randomly selects a page with a multiplication array of planets that contain a particular number of moons around them. Students walk through the process of turning the array into a multiplication equation and then answer, all using the pens. When finished, students touch each white square to check their answers. Boxes disappear with a "space warp" sound to reveal what the correct equation looks like.
Use this as a multiplication lesson, as a way to practice as a whole class, as a station for challenging students who are advanced. 30 pages encompass equations multiplying numerals 1 through 9.