Barry's Roll, Slide, Glide! (A Bugville Jr. Story)
A Playful Experiment in Predicting, Testing, and Trying Again

Barry and Buster want their toy wagon to travel farther, but pushing harder does not produce the result they expect. Instead of calling the attempt a failure, Barry suggests changing one feature at a time. The friends compare slopes, surfaces, and pushes while making predictions and noticing what happens. Their energetic investigation shows young readers that every result provides useful information—and that changing a plan is part of solving a problem.