Story Place: La biblioteca digital de niños is an interactive Spanish site for children. Choose between books aimed at preschoolers as well as elementary children. It should be noted that adults learning a language can also visit this site. The colors and graphics are for children, but the level is simple, which can allow adult learners to quickly grasp the reading activities and move onto a higher and more sophisticated writing style.
Aimed at the elementary reading level, abcteach.com features a collection of online reading activities in Spanish that can be downloaded. There are 15 exercises that are free to everyone, and another 15-plus available to those who sign up for a paid membership.
Spark Enthusiasm has a number of online reading activities for those wishing to review for advanced placement Spanish tests. They are useful for those who are looking for online reading activities for self study as well as those who are looking to practice for a placement exam.
Advanced learners can keep their language in practice by visiting sites for native speakers. The BBC offers Mundo, its Spanish language news website which is a good way to both practice the language and keep up with relevant news.