My child brings so much art home and it is just important to her as it is to us.Although you can't keep all their art, pick through the ones you treasure the most then collate them all in a file. Once you have collected all their beautiful piece put them together in a frame like this. Alternatively you can also arrange their art and glue it to canvas. I don't like cutting children's art but hey better then throwing it away or shoving it in a cupboard.
Great activity during a weather unit. 2 liter soda bottle cut in half. Put about an inch and a half of warm water (w blue food coloring) in the bottom. Invert the top of the bottle with the lid on and fill with ice. Watch the water condensate and watch it "rain"
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.