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This crazy critter moves on its own—just don’t expect it to clean the floors.  WHAT YOU’LL NEED • 4 AA batteries • 6-volt battery case with wire lead terminals and an on-off switch (we used the Philmore BH3411B AA Battery Holder, $1; amazon.com) • 6-volt hobby motor (like the Uxcell High Torque Cylinder Magnetic Electric Mini DC Motor, $6; amazon.com) • Electrical tape • Washer, dime, or other small, flat object • Kitchen brush • Duct tape • Felt • Scissors • Tacky glue  WHAT TO DO 1. Pu...

8 Fun STEM Crafts for Kids Forget those problem sets! Get your kids psyched about STEM with interactive toys they can make at home. They'll be amazed to see science, technology, engineering, and math in action in a setting that feels nothing like school.