This is a simple retelling of a time when Sid had his ice pop melt and how he figured out that sometimes solids can change state in become liquids again. Along with his friends and family, he also discovers that this is a reversible change and he makes ice pops again.
I always like Sid the Science Kid shows - they reinforce real science at a preschooler's level without babying them. If you like the show, this book will appeal to you. It looks just like the show but without the singing and silly jokes.