Aerobic: Rhythmic movement of large muscles. Increases cardio-respiratory fitness levels. Examples include: running, skipping, hopping, dancing, or swimming. Includes both moderate-intensity aerobic activity  (this type of activity increases heart rate and breathing from normal resting rate) or vigorous-intensity (getting the heart beating much faster and breathing much harder than normal) aerobic activity.

Muscle Strengthening: Activities requiring increased work of the muscles. This type of activity strengthens the muscles and includes both structured and unstructured activities. Examples include: playing on playground equipment, weight lifting, or strengthening bands.

Bone Strengthening: Produced by impact on a hard surface (usually the ground), promotes bone growth and strength through the impact. Can also be aerobic and muscle strengthening such as running or basketball.

Balance: Activities which improve and/or maintain one’s balancing abilities.

Flexibility: Activities which improve and/or maintain one’s flexibility.

http://www.who.int/dietphysicalactivity/factsheet_recommendations/en/index.html

http://www.cdc.gov/physicalactivity/everyone/guidelines/children.htm