Preschoolers like colorful crafts, so add some character to your snowflakes. Give children plain coffee filters and markers to add designs and patterns. Warn them that coloring too much in one spot will cause the delicate filters to rip. Once everyone has decorated a filter, pass out cups of water and eye droppers. Demonstrate how to pick up a little bit of water and squirt it onto the filter. The water will blur the marker and give the filter a tie-dyed look. Have children continue squirting until the entire filter is damp, then let the snowflakes dry before hanging them up.
Explain how a wind sock can show you whether the wind is blowing and in what direction. Cut squares out of waterproof material such as a lightweight picnic blanket or disposable work coveralls. Give children crayons to decorate their squares. Show children how to cut slits up one half of the square. The top half of the square should be solid, while the bottom half hangs in inch-wide strips. Bring the two sides of the square together and staple them, creating an open cylinder. Punch two holes at the top of the wind sock, tie a string through them and hang the socks outside of a window.
Trace the shapes of a cloud, a sun, a raindrop and a snowflake. Give each child two copies of each shape to decorate and cut out. Pass out cotton balls or cotton batting. Put the shape pairs together with the decorated sides facing out. Staple the sides together, leaving a small gap at the top. Have children fill the inside with cotton, then staple the top. Punch holes through the tops of each weather shape and tie string through the holes. Tie each string to a coat hanger and hang the weather mobiles from the ceiling.
Children can hear the sound of rain any time with their own rain sticks. Give each child an empty paper towel tube, two six-inch brown paper circles and a bowl of dry beans or rice. Have children first wrap a paper circle over one end of the tube and hold it in place with a rubber band. Tell them to scoop a handful of the rice or beans into the tube, then cover the open end of the tube with the other paper circle and another rubber band. Provide crayons and markers for decorating the rain sticks. Each time the tube is turned over, the sliding rice and beans sound like rainfall.