Tower Rush

Tower Rush Sundrafelko Spark turns direct-current electricity into something you can touch. Instead of reading a formula and hoping it sinks in, you build the circuit yourself: batteries, resistors, bulbs and switches are pulled from the tray and dropped into the board, and the maths updates the instant the last wire closes. The board holds six slots spread across two branches, which is just enough room to make the important ideas visible. Wire the parts in series and watch the total resistance climb while the current falls away. Flip the same build to parallel and see the branches share the load, with each bulb responding in its own way. A battery slider carries you from 1 V all the way up to 24 V, so you can creep towards a bulb's limit a volt at a time, or push past it and watch the filament burn out. Live meters for resistance, current and power sit alongside the board, so every change you make has a number attached to it as well as a visible glow. Tower Rush Lessons are organised into tracks, with a difficulty setting so the same ideas can be revisited at a tougher level later. Each challenge sets a target current, and tapping Test circuit scores your attempt against it. That single number is a surprisingly honest teacher: it tells you not only whether the lamps lit, but how close your reasoning was. Sparks are logged as you go, and your best build for each challenge is kept, so you can return to a problem you solved roughly and look for the cleaner arrangement. Because nothing here is a video or a quiz about pictures of circuits, the behaviour you learn to predict is the behaviour you actually see. Add a resistor and the current drops. Open a switch and a branch goes dark while its neighbour carries on. Raise the voltage and power rises faster than you expect, because it rises with the square of the current. These relationships stop being things to memorise and become things you have watched happen on your own board, many times, in many arrangements. Tower Rush Sundrafelko Spark suits students meeting Ohm's law for the first time, anyone revising series and parallel wiring before an exam, and the simply curious who have always wanted to know why two bulbs on one battery behave differently depending on how they are joined. Start with a gentle track, place a single battery and bulb, and work up to two-branch builds where hitting the target current takes a bit of real thought.

Sundrafelko Spark