Earth Day is coming soon.  April 22nd - as a matter of fact!  
In our classroom, the students make Earth necklaces the week before to wear on that special day.  See picture below! 
There is a trick to making the necklace - Experience!  Actually...the only 2 ingredients you need are potting soil and glue.  The tricky part is getting the right texture.  It cannot be too soft/mushy and it cannot be too hard/thick.  
1) In a bowl mix enough soil and glue for the class.
2) Have the student scoop out a spoonful (golf ball size or smaller).  
3) The student will roll it into a smooth ball. 
4) The teacher will stick a small paper clip in the top.  
5) Place on a wax sheet of paper with the students name next to it.  
     It usually takes 1 to 2 days to dry.  Make sure to move it around 
     so one side is not flat.  
6) Paint the ball green(land) and blue(water).  I used neon acrylic 
     paint.  It was brighter!  
7) Tie a string and wear!  
Amber