These six amusing, clever cogs fascinate kids! Turn on the battery-powered main gear and stick it to any magnetic surface. Continue adding the other 5 gears and watch as they flop, twirl, and turn. It's mesmerizing, magnetic mechanics! Each gear has a magnetic back, and is useable on all magnetic upright surfaces. Post notes, your child's artwork, or other important papers with flair and fun! Requires one AA battery (not included). Age: 3 years and up