good kit, of which the favourite will be the propeller launcher and the noise maker, different parts suitable for a range of ages, eg getting new entrants to help you find the numbered pieces and launch the blade. Getting older students to follow the plan book, and then try out the challenges. They sometimes have difficulty connecting pieces, magnetic connectors join easier, but it is mostly easy to build. Set works for one person/group or two at a stretch.

After replacing one the lamps that stopped working after less than a minute we got going again. Sadly, the number of experiments is padded out with a LOT of repetition. There are probably only about 15–20 genuinely different things to do but they inflate that number by doing the same circuit but swapping out one switch for another type (mechanical, magnetic, audio, push). There's a couple of hours of entertainment but not much more than that.

Great kits – keeps the children absorbed for hours. Easy to assemble with clear instructions.