Aqua Arcade - Venturi Effect

I grabbed this for myself honestly, but my 9-year-old hijacked it within ten minutes. The venturi effect setup is simple enough that she figured out how to change the flow on her own, and now I keep finding water cups around the house.

My kid spent a solid hour just watching the water speed up through the narrow section, then asked me why it did that — which is exactly the kind of question I was hoping for. The Venturi effect setup is simple enough to assemble without me hovering, but still fiddly enough that he felt like he built

I was surprised how much fun explaining fluid dynamics could be—watching the Venturi effect pull water through the tubing is oddly satisfying. The setup took under two minutes and kept my attention longer than I’d admit.