We suggest using UPS or Fed Ex - USPS has been very unreliable
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Discover the fun and excitement of science in your everyday life! Conduct over 30 interesting fun experiments to learn some scientific principles behind them. Make a clock which is powered by fruit, create a water fountain inside a bottle, drive a diver to move up and down without touching it, construct a hovercraft with a CD, build a mini water cycle model in a glass and more.