Colored chalk (as many different colors as you like)
Clear glass bottle
White glue or bottle cap
Any sort of board
Spread out the newspaper on your working surface.
Place some sand on the board.
Take any colored chalk and roll it in the sand, until the sand turns that color.
Put the funnel in the bottle.
Lift the board and empty the sand into the funnel.
Take the stick and make a few bumps in the sand.
Repeat, using a different color of sand each time, until the bottle is 1/2 inch less than full. If you are using a bottle cap be sure to fill the bottle to the top.
Press the sand down firmly, be careful not to move the bottle around or the sand will smudge.
If you are using the glue, pour it into the remaining 1/2 inch of the bottle, and let dry. If you are using the bottle cap, screw it on.