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Engineering is such a fun Science subject to teach. If you have a child that loves to build things and create things they will love learning about engineering. Engineering makes a boring Science subject really come to life.
I found a really fun engineering unit from Engineering is Elementary. This unit is completely free and has 9 different 45 minute activities that teach your kids how to explore how bubbles work, how to investigate the different materials that make up bubbles, and how to engineer many different types of bubble wands. There is a free Educator Guide, and Engineering Journal, and free online resources in this unit.
You can download this free engineering unit HERE.