“This series, writ­ten by well-known author Sal­ly M. Walk­er, is most suit­able for mid­dle to late ele­men­tary grades. Each para­graph sums up an idea with a pic­ture to rein­force it. The books also make use of inter­est­ing sci­ence expe­ri­ences which will draw the atten­tion of read­ers. The use of every­day exam­ples makes these sci­en­tif­ic facts more eas­i­ly com­pre­hend­ed. There are also cap­tion box­es that add a bit more infor­ma­tion to each top­ic. The ‘Learn More About’ page in each book makes them more acces­si­ble to read­ers who may want to know more about a cer­tain con­cept. The series is a great begin­ning sci­ence unit for mid­dle aged learn­ers.” (Library Media Con­nec­tion)

“Inter­ac­tiv­i­ty is encour­aged, as read­ers are direct­ed to per­form sim­ple exper­i­ments along with chil­dren shown in accom­pa­ny­ing pic­tures; the texts pro­vide guid­ance on what to look for. Clear expla­na­tions, relat­able exam­ples, and effec­tive visu­als make these sol­id selec­tions.” (The Horn Book Guide)

“This series is well orga­nized and writ­ten in clear, con­cise lan­guage. The first chap­ter in each vol­ume focus­es on why a par­tic­u­lar form of ener­gy is impor­tant for peo­ple and/or the envi­ron­ment. Suc­ces­sive chap­ters dis­cuss how that ener­gy is gen­er­at­ed and how it can (or can­not) be manip­u­lat­ed to peo­ple’s advan­tage. Sim­ple exper­i­ments using every­day house­hold objects with clear instruc­tions are pro­vid­ed in almost every chap­ter, with appro­pri­ate notes when adult super­vi­sion is nec­es­sary. Crisp pho­tographs and/or dia­grams are pre­sent­ed on every page, as are side box­es that con­tain either addi­tion­al infor­ma­tion or ask ques­tions that draw read­ers back into the main text.”
(School Library Jour­nal)