Draw out the shape of your cloud on white construction paper. A good basic cloud shape is a long oval, making the lines wavy to emulate the random wavy lines of a cloud. Kids can also do fun shapes and make heart-shaped clouds, star-shaped clouds or any shape they like.
Cut out your cloud tracing from construction paper; lie the cutout flat in front of you and have kids do the same, using child-safe scissors or cut-out shapes. Put out a few jars of non-toxic crafts paste and provide each child with a wooden applicator stick.
Dip the applicator stick into the paste and get a small amount of paste onto the end, then apply the paste to a cotton ball and glue the cotton ball to the cloud template. Demonstrate this for kindergartners and have them do the same.
Apply cotton balls to the entire surface of your cloud template until it is covered evenly and looks like a fluffy homemade cloud. Hang them on walls with tape or string, and from the ceiling.