Aries are always on the go. This Anker Power Core Mini portable power bank will make sure their phone or tablet battery is charged, even if they aren't near an electrical outlet.
Taureans are reliable and like to be prepared. The classic Victorinox SD mini Swiss Army knife keeps them ready for anything with a small blade, scissors, nail file/screwdriver, toothpick, tweezers & keyring. It comes in several colors & patterns, like this cool marbles design.
Geminis are eager to learn new things. The Fun Knowledge Encyclopedia: The Crazy Stories Behind the World's Most Interesting Facts is entertaining and informative.