Am relieved my Mum did not read earlier review before purchase as otherwise would have deprived my 2 budding scientist sons of a really nice product. All the things not included are everyday objects like salt, water, vinegar, washing up liquid, so I do not have to make a mad dash to the shops for expensive materials! There are a few things we do not have but they do not cost a lot of money anyway! Plus I am more than happy that they are experimenting with household stuff rather than dangerous chemicals. think reviewer missed the joke re needing a radiator- it's clearly meant to be humorous, because all you need it for is to dry some paper over! Lots of interesting experiments, sound principles and good information, we like it.