Yes, they're that tiny. Yes, they actually work. From a surprisingly strong blower that dusts off your keyboard to the micro vacuum that sucks crumbs off a desktop to a micro toolbox that holds a measuring tape and two screwdrivers, each is the right tool for big little jobs. Plastic. Item does not come with a USB cord it Plugs into USB Computers or Charging Adapters, also takes 3 "AAA" size 1.5v batteries (not included). Ages 6+. Choose 6" Blower, Tool Kit or Vacuum.