Wall mounted ball run. This would be great for kids who are too young for the marble runs. Could be used as a music installation if there are movable obstructions in the pipe that make sound when a ball touches them
Teach and motivate your students to use different voice levels depending on the place or activity. There are 2 different colour versions. There is also a Spanish version (Niveles de voz) and a bilingual version (Voice levels bilingual) in the store.