Aviation

Aviation Activities for Kids has Four fun aviation activities for kids from How Stuff Works including rocket races and a stable airplane mobile.
http://lifestyle.howstuffworks.com/crafts/seasonal/summer/aviation-activities-for-kids.htm

Create your own flight plan and aeronautical charts with Skyvector. It’s a little tricky at first, but there are plenty of tutorials for budding pilots.
http://skyvector.com/

With Aviation Weather Center your can track weather conditions around the world.
http://www.aviationweather.gov/

The GeoFS website is a free, online flight simulator with visual imagery from around the world.
http://www.geo-fs.com/

You can build your own plane with four amazing from-scratch aircraft, plans. 
http://www.popularmechanics.com/flight/how-to/g631/4-amazing-diy-planes-and-how-to-build-your-own/

This British YouTube series, Amy's Aviation offers the basics of aeronautics. Suitable for children just beginning to explore the mechanics of flight.
http://www.youtube.com/watch?v=vScepc2EjPUAnchor