Adding to our cloud/weather week, we also made a tornado in a jar. The girls loved this one and we have had it on the counter for a few days randomly playing with it! There is a tornado spinning in the jar in the picture, but was kind of hard to make out in the one below.
Jar/Tall see through Container with Lid filled with water
1 tsp Vinegar
1 Drop of dishsoap
Glitter *or something similar*
Monopoly houses/Game of Life Cars* optional but made it more fun
Now, throw everything into your jar and shake in a circular motion!