Cumulus Cloud PlushClouds develop from water vapor that cools in rising air. The wind, temperature and moisture determine the type of clouds. Cumulus are puffy clouds like cotton balls that float across the sky, a picturesque backdrop to a beautiful day. Get your head in the clouds with this soft adorable plushie, sustainably crafted from recycled materials. Wonderful gift, educational tool, and fun decoration for families, friends, students, educators, scientists,