Soil and Sand Links
https://www.turtlediary.com/video/soil.html
http://www.teachertube.com/video/soil-is-like-a-chocolate-chip-cookie-10438
https://cptv.pbslearningmedia.org/resource/arct14.sci.cgsandsoillp/curious-george-sand-and-soil-lesson-plan/#.WkughFWnGUk