Rather than logos, have participants use a famous tag line or marketing slogan. Break the group into small teams of four to six members. Have the team choose a logo that best represents them. Alternatively, choose a logo that best represents the project or the whole work group they belong to.
Your body makes vitamin D when your skin is exposed to the ultraviolet B (UVB) rays in sunlight. About 5 to 30 minutes of exposure to the skin on your face, arms, back or legs (without sunscreen) two times every week is enough. But, too much exposure to sunlight is a risk for skin cancer, so you should use sunscreen after a few minutes in the sun, even on hazy or cloudy days.
Full sunlight on a clear summer day has an intensity of about 10,000 foot-candles. A classroom will have an intensity of about 100-foot candles. Photosynthesis and hence rate of plant growth will increase linearly with increases in light intensity from about 100 foot-candles to about 2500 foot candles. A large number of plants are more efficient in use of sunlight and will increase in their rates f photosynthesis up to 10,000 foot-candles.