1. string
2. Electric fan
3. Picture of a big wind turbine which is used for producing electric powers and picture of storming.
4. The activity book "Nature around us" Kindergarten level 2 page 29.
Evaluation
1. Observe while students blow the string, discuss, and answer the questions about wind advantages
2. Evaluate an assessment sheet of trace the dotted word, and color the picture of the advantages of wind power