Links

Easy Hydraulic Machines. http://www.instructables.com/id/Easy-Hydraulic-Machines/

Syringe Hydraulic Arm. http://www.scienceguy.org/Articles/SyringeHydraulics.aspx

Hydraulic Toys. http://makerfaireafrica.com/2012/11/05/a-15-yo-nigerian-boys-hydraulic-toys/

Hydraulic Jack. http://www.arvindguptatoys.com/toys/jack.html

Materials

Airline Tubing (Walmart has 25' for about $3.00)

Syringes (Tractor Supply has them for $0.30, $0.50, or $1.30 each. Smaller is easier to use.)

Toy #1.

Syringe pushes the yellow “bubble tea” straw forward, which knocks down block tower.

Toy #2.

Syringe pushes triangle upwards, that tips the green “bubble tea” straw upwards.

Toy #3.

A second syringe pushes up, and raises the top yogurt container.

Tips:

• Small syringes are easier to push and pull. They also fit the airline tubing, better.

• Fill tubing with water. Don't let many air bubbles get in.