Growing up I hated playgound equipment. Namely:
The metal slide; reaching the surface temperature of the sun, would leave blister on backsides.
Birds exploded when they landed on it.
The teeter-totter; where fat kids ruled and skinny kids becase airborne.
The merry-go-round thingy; with a faint odor of vomit from dizzy kids.
The swings; a place where you got kicked in the head when waking by.
The sandbox: The neighborhood cat litter box. Kids often discovered little "treasures".