BAILEY, Loren . 30-Minute Robotics Projects . ISBN 9781541538887 . BAILEY, Loren . 30-Minute Sustainable Science Projects . ISBN 9781541538900 . LEIGH, Anna . 30-Minute Chemistry Projects . ISBN 9781541538931 . LEIGH, Anna . 30-Minute Edible Science Projects . ISBN 9781541538917 . LEIGH, Anna . 30-Minute Outdoor Science Projects . ISBN 9781541538894 .ea vol: 32p. (30-Minute Makers). further reading. glossary. index. photos. Lerner . Apr. 2019. Tr. $27.99. Gr 2-5 Simple instructions, well laid out and illustrated, make the eight to 10 projects in each of these books attainable and interesting. Most include two components: setup or construction and running the experiment. While all of the projects can be completed in 30 minutes, many can be extended by altering variables and running additional trials. This offers excellent scientific method practice. There's lots of timing, measuring, observation, and comparison of results. Materials are drawn from on-hand items, with a few special purchases neededcitric acid, black light, borax, and activated carbon. Some procedures are fairly exacting, and some require real dexterity. This is not necessarily bad, just something to note. Check the table of contents before buying; many projects may appear in books you already own. Online content, accessed via QR codes, includes links to supplies, related media, careers, and some truly wonderful next-level projects. VERDICT A good choice if your project books need refreshing.