Trap Water with Holes

You can keep water inside a glass by covering the top of the glass with a piece of cardboard full of holes! To trap water with holes you need: a glass water thin cardboard thumbtack or small sharp nail Directions: Poke lots of holes into the cardboard with a thumbtack or nail. Fill the glass with water until it is over-flowing. Press the cardboard over the top of the glass until water squishes through the holes. While still pressing the cardboard over the top of the glass, turn the glass upside down. Take away your hand. The cardboard sticks to … Continue reading Trap Water with Holes

Tippy Tap Hand Washer

http://teachers.egfi-k12.org/tippy-tap-hand-washer In this service-learning activity, student teams will learn the basic principles of fluid dynamics as well as how engineers improve society by designing a prototype system to pipe water from a storage tank to a simple hand-washing station called a Tippy Tap. These inexpensive, homemade devices are used extensively in the developing world, but because they must be manually refilled with water, they are of limited use in high-traffic areas. 2019.4.2 The students brainstormed, chose their first engineering design project and completed the pre-requisites on the engineering design process for the Tippy Tap Hand-Washer. Students have purposed that this … Continue reading Tippy Tap Hand Washer

Spy with a Periscope

Peek around corners without being seen. A periscope allows you to look almost anywhere while hiding behind walls, furniture, doors – wherever. To make a periscope you need: a one liter milk carton scissors two small rectangular purse-sized mirrors masking tape Directions: Cut the pointed end off the carton. Cut a 7 cm square from one side at the open end of the carton, near the top. Tape your cut out square to where the spout was to make a flat top. Tape a mirror inside the hole at a 45 degree angle, the reflective side facing the bottom of … Continue reading Spy with a Periscope

roller coaster

Roller Coaster – an amusement ride developed for amusement parks. A specialized railroad system, a roller coaster consists of a track that rises in designed patterns, sometimes with one or more loops that briefly turn the rider upside down. Most roller coasters have multiple cars in which passengers sit and are restrained. The earliest amusement parks and roller coasters in the United States were built on Coney Island in New York during the late 1800s and early 1900s. More than 30 roller coasters were built on the island from 1884 through the 1930s. Built in 1927, the Cyclone Roller Coaster, … Continue reading roller coaster