Cirro, or cirrus, means curl of hair in Latin. This term refers to a wispy, curly formation. Cumulus derives from the Latin word for heap. Cumulus clouds are piled and fluffy. Stratus derives from the Latin verb sternere, which means to stretch.
Stratus clouds extend in flatter formations than cumulus ones.
Your kids might enjoy keeping a record of the types of clouds they observe on different days and noting the weather conditions associated with them.