With a USB port so users can keep track of their score the interactive "Toylet" offers several games using your bodies waste fluids as a means of control. Talk about innovative controller free input methods! I imagine skilled users will show off with the hands-free mode!
In the game "Ihe North Wind and Her" players control the wind trying to blow up some young babes skirt. Using the force of your urine stream to control the gusts of perverse wind.
"Milk from Nose" is a multiplayer game that thankfully doesn't have you compete with actual urinators in the next stall. You pee as hard as you can which on translates to the onscreen milk nose spraying competition agains the previous urinal users score. Whoever loses is overwhelmed by your strong spray and gets knocked back.
In the game "Graffiti Eraser" the player is tasked with cleaning graffiti off of walls using a hose. which I think will be the most immersive and realistic of the mini games.
In "Mannekin Pis" you measure the force of your pee. Judging by this screen shot I wouldn't be surprised if it challenges you by controlling the force of the pee pee so that you can fill that bottle with pee. For some reason.