Switch Pitch Ball @Teachersource

Uploaded December 2017 | Updated September 2026, 2 weeks ago

Toss the ball in the air and watch the colors magically flip! Great tool for teaching activation energy to chemistry students, teaching younger students about chemical vs physical change and even transitional vs rotational energy! Available at teachersource.com/product/hoberman-switch-pitch-ball/chemistry-models

Phenomenon Based Education with databot™ 2.0

$Water Gel Spheres Place these hard crystals in water and they expand about 300 times, producing gel like spheres with the same index every refraction as water making them virtually invisible. Students love to feel the slippery, spiracle gel! Ask students to determine the change in volume, great for starting seeds and growing plants so that roots can be seen. Can be tinted using food coloring. Can also be used as ghost eyeballs for some Halloween fun. This polymer is similar to our super-absorbent, polyacrylamide polymer and can be dried and reused. Available at https://www.teachersource.com/product/growing-spheres/chemistry-hydro$