Mr. Whiskers, the teacher, has that wild look in his eyes again. That’s the look that means, Get ready for hands-on science! This time the subject matter is . . . matter. Using seven science stations, Mr. Whiskers encourages his kids to use all their senses to make observations and draw conclusions. Everyone’s a scientist in Mr. Whiskers’ class, where hands-on mini-experiments lead to Big Ideas — and promote an ongoing passion for independent, open-ended discovery. Back matter includes supplemental activities.