Try this activity in your sensory table for your dinosaur fans! In containers of various sizes, freeze sand, shells, plastic dinosaurs, and or plastic bones in water. (If your items tend to float, freeze the container half full with the water and the items. Once it’s frozen, and holding the items in place, you can fill the container the rest of the way with water and freeze again.)
Place these prehistoric ice cubes in your sensory bin alone or with sand. You can also bury them in the sand for even more fun! Add containers of warm water with droppers or larger containers with warm water that the ice cubes can be submerged in.
When you think of graphing, you probably think back to stale worksheets in your third grade class, or to more complicated parabolas in high school calculus. Graphing starts out as a very simple concept, one that can and should be explored with preschool children, particularly the four year-olds. One of my favorite ways to do that is with a Post-it graph. 
