A little science...This would fascinate kids. Rainbow roses, you can do this by splitting the stems into strands and placing each one in food colouring the roses draw the liquid colouring into the petals, amazing!
Borax snowflakes - If you have Borax at home, you SO need to do this with the kids. Do it after dinner, and by breakfast the kids will be amazed at what has happened! We have 8 snowflakes hanging in our window just a-sparkling away!
Weather: Fill the cup with water. Put shaving cream on top for a cloud. Explain that when clouds get really heavy with water, it rains! Then put blue food coloring on top of the cloud, and watch it rain.