EUDAXFruit Battery Science Experiment Kit with Electronic Clock and RGB LED for DIY Home Teaching Toy, School Science Project, Education Subject

It works but light does not work as other have stated

This kit is the one with the cool multi colored LED. The rest of the kit is so-so. No one kit has all the best stuff, get multiple kits.Potato battery notesFirst off, if your kid is going to do a potato battery science project know that this is harder than it looks. The LED lights typically require 3 volts and about 20 mA to light them up. sometimes you will get lucky with fewer milliamps, but most require 20 mA. This requires more potatoes and more wires than you might expect. Obviously, results may vary, but don't expect this to work with 1 or 2 potatoes. It took about 12 potatoes (4 in series, 3 in parallel) for my kid's project. Expect it to take at least 4 potatoes. Most of these kits don't have enough wires to connect all the needed potatoes (if you use 12 potatoes as we did). I ordered two different kits, and then later 3 more of a third kit type before we finally succeeded. Also, the larger the surface area of the zinc/copper, the more power output you will get. The rectangular metal pieces seemed to have better electrical properties than the spike-shaped ones. I think they must have increased surface area.Powering a small siren/noise maker or a clock (included in some kits) uses much less power than the LED light. A small non-LED Christmas light takes about 100 mA for full brightness.Warning: The clocks in the kits are very delicate and the wires break very easily.Wires with alligator clips are better than wires without clips.One of the kits we used came with a single LEDS that flashes multiple colors. each color using a different amount of current (mA). This was pretty cool. It required about 6 to 20 mA to light up. I used my multimeter with a store-bought battery to determine how much current (mA) each load (LED light, fan, clock) used.Pro tip: boiling a potato for 8 minutes increases the power output (credit goes to Israeli Researchers)Also: You cannot charge a phone or light a large bulb from a battery. Those are hoax videos going around the internet.

Excellent product, service and quality for such low and satisfying price.

Bought for my 11yr old son for homeschool science lesson. It's interesting but there is no instruction booklet and It wasn't that obvious how to use it. After some tries we figured it out. The little digital clock was too small and not programmable. I would have preferred an analog clock. Anyway it served its purpose and worked.

I used this to teach my kids how electricity works -- how to use it and how it is generated and why. The watch face isn't really servicable (like you can't really set the time on it since it uses flimsy switches) but that doesn't matter, it shows the concepts really well.