A great site with games for young kids to learn about simple machines (all Jr.FLL models are required to have at least one simple machine in them). This site is perfect for 6-9 year olds.
Physics Lapbook Light and Color example 9
Fun Science Activities for Kids
How to Make a Wind Vane
Activities: Make a Wind Vane SCI.2.2.1 2010 Construct and use tools to observe and measure weather phenomena like precipitation, changes in temperature, wind speed and direction. SCI.2.2.2 2010 Experience and describe wind as the motion of the air.