Gel Pens
The 1990s school-supply craze: smooth-writing gel-ink pens in glittery, metallic, pastel, and neon colors (the opaque pastels known as "milky pens") that showed up vividly even on black paper. Kids hoarded huge collections, traded colors with friends, and covered notebooks and each other's arms in shimmery ink—a quintessential 90s classroom status symbol.