Kids Invention: Grappling Hook Zipline

What is the main purpose of Courtney's invention?

• To create a new type of toy

• To enhance communication

• To help escape from a tower

• To improve transportation

What material is used to form the body of the crossbow?

• Metal

• Plastic

• Wood

• Rubber

What is the purpose of the winch in the crossbow setup?

• To stabilize the crossbow

• To pull back the string

• To decorate the crossbow

• To fire the grappling hook

Why was a second leaf spring purchased?

• The first one was not bendy enough

• The first one was too bendy

• The first one was too expensive

• The first one was too heavy

What is used to create the string on the crossbow?

• Wire rope

• Nylon rope

• Elastic band

• Cotton thread

What was added inside the aluminum pole to strengthen the crossbow bolt?

• Plastic rod

• Wooden stick

• Steel rod

• Rubber tube

What is the special feature of the rope used in the crossbow?

• It is very elastic

• It is strong and light

• It is very heavy

• It is colorful

What is the role of the tensioning devices in the setup?

• To increase the speed of the zipline

• To decorate the zipline

• To shorten the zip wire

• To tension the zip wire

Who sponsored the zip wire used in the project?

• Gripple

• eBay

• Amazon

• Walmart

What is the final step before testing the invention?

• Mounting the crossbow

• Painting the crossbow

• Attaching the grappling hook

• Thanking the sponsors