$7.95
The transparent tube allows children to visualize the chamber size changing as the sound changes.
Transparent slide whistle and all new packaging is designed to show children how sound works. The transparent tube allows children to visualize the chamber size changing as the sound changes.
Perfect for science projects.
Related products
Slide Whistles
$54.99
Slide Whistles
$5.95
Slide Whistles
$6.00
Slide Whistles
$24.50