Legos
Small and colorful plastic bricks that can connect to each other to build structures of all sizes. Often used by children, but some adults can take them up as a hobby.

Legos have an unintentional use though. They work as landmines to those who are barefoot.
Guy 1: Ouch! Damn it!!!!!

Guy 2: What happened?

Guy 1: Fucking Timmy's Legos are all over the floor.

Guy 2: Sounds like someone is getting a beating after soccer.