From the site: wickED is a quality-assured online environment for young people aged 7–12 year olds (years 3–8). You’ll find engaging curriculum-based learning activities in English and te reo Māori here. (This is a site from New Zealand) Many activities have a literacy, numeracy or ESOL focus, and students can use the activities in a independent or in a facilitated way.
Lots of neat activities and interactives here. I also found some interactives to explain about plate movement creating earth quakes. Very helpful when explaining what has happened recently in Japan. You can find that here.