Contraption
Under a tree a drunkard sits with twenty little contraptions. There's little electronic ones, little bopping ones, little walking ones... twenty of them.
Can you even imagine twenty completely unique contraptions? Why don't you try, just for fun.
かい
かせ
None
You want to know what these contraptions are for, so you ask. The drunkard says, "These are kayak (かい) contraptions *urp* they're for your uh *blarp* kayak... things."
"Kayak contraptions" is pretty vague, but you do have a kayak, so you're tempted anyway. If only you could figure out what each contraption did so you could justify buying some.