Every Thursday morning we head off to the science room for a fun, hands-on, and age-appropriate science activity with Shan. These past two weeks we have been learning about sinking and floating. Whether an object sinks or floats in liquid depends mainly on two factors: density and buoyancy. At this level, however, children do not need to explain why objects sink or float, but rather are encouraged to make predictions, observe, and devise their own ideas about physical properties. Last week, we tested many objects in water - some objects surprised us by floating when most thought sure it would sink! This past week we were challenged to build aluminum foil boats that would hold the most pennies.