Build your own chain reaction machines: how to make crazy contraptions using everyday stuff--creative kid-powered projects!

Made one of these so far. Very convoluted, but worked really well. The kids enjoyed making it, although they needed a lot of help with the cutting - it does need to be fairly accurate. Looking forward to the next one.

It isn’t very inspiring or easy, would prefer something kids can do alone not needing me, I don’t have time for these,Needs a lot of stuff and time.Maybe for nerds but I’m using other means to teach themThese kind of machines that is more relevant and inspiring.

Great idea and inventive but quite time consuming cutting up a lot of cardboard! Would be great if ideas for recycled items instead.

Ótimo. Atendeu todas as expectativas.

They are all really cool projects and my son is enthusiastic about building them all, but it is a lot of work for me measuring andcutting out all the tiny intricate pieces of cardboard needed. He is 7 and can help putting it together but I definitely need to do must of the work. It is fun and I like doing this sort of thing, just be prepared to do a lot of time consuming work yourself unless the child is much older and able to cut precisely with a utility knife.