Concept: "Pool Party" Skins
Great April fools idea have a bunch of skins using this type of pool.
For top we would have
He would use the triangle as the boomerang, and when he throws his boulder in mega form it would be a pool ball.
For mid we would have
Just using a pool ball for her abilities
Jungle would be
He would just be using pool balls for his abilities
ADC would be
She would throw pool sticks, and her ultimate would be a pool ball
For Support we would have
He would use a pool table for his shield, and his q would be a pool ball