A hose connects two needle tubes (syringes). Pushing and pulling one needle tube will change the other. This is because the pressure of the liquid or air in the needle tube is converted into mechanical energy that can push the needle tube on the other side.
Material: green wood
Type: STEM toys, DIY toys
Suggested Age: 8 years and up
Package: PE ziplock bag*
*Some orders are individually packaged in cartons, but this is not guaranteed.
Note: this is a DIY kit, you need to assemble it
WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.