Introduction: Extending Grabber
Step 1: Materials
Step 2: Assemble and Reinforce the Beams
- Create four beams by inserting the craft sticks into the pieces of straws.
- Leave a small gap (about 1mm) between the ends of the craft sticks.
- Break off a 3-4" piece of skewer. Get a piece of masking tape. Use both hands to hold the tape and stick it onto the skewer. Without letting go of the tape, apply it to the straw piece. Fold the other half of the tape over the skewer.
- This will reinforce the connection between the sticks. Without it, the straws might bend and cause the grabber to be inoperable.
- Young students may have trouble with this step.
- Repeat with all four beams.
Step 3: Connect the Beams
- Use the pointed end of the skewer to carefully pierce the center of the straw.
- Pierce another straw piece with the same skewer.
- Pull the skewer most of the way through, then break off the skewer, leaving a 2-3" piece connecting the two straw pieces. By pulling the skewer all the way through, the pointed tip can be reused.
- Repeat for the other two beams to create two 'X' shapes.
- Repeat this process to connect the two 'X' shapes together as depicted.
Step 4: Design the Grabber
Use pieces of craft sticks, pipe cleaners, and/or rubber bands to improve the grabber's grip. This part of the project is more open-ended.
Step 5: Test
Tape two cups together as depicted.
Try to pick up the cups. If this proves too easy, then improvise new challenges.
Avoid picking up objects that weigh more than a few ounces.
Step 6: Safety, Tips, and Troubleshooting
- The skewer pieces may be pointed. Don't allow students to try to grab at each other or wave the skewers above shoulder height.
- Be sure that students create and reinforce the beams before assembling. Students may be eager to assemble the beams, but the reinforcement step is important for this project to be durable.
- The cup challenge may be easy for many students. Improvise a variety of challenges to encourage redesign, such as picking up a large marker, a rolled up piece of paper, your keys, or other small objects.
- If the joints are falling apart, you can wrap tape around the skewer pieces to prevent the straws from slipping off.
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I have some milkshake straws and craft sticks, however my straws seem to be too big. Do you have a size for the straws needed? I couldn't find one on the amazon link. Looks like a great activity! Also, do you think you could use toothpicks instead of skewers for the connection stability?
The straws need to be about 1/4" in diameter. You can use larger straws and just tape the straws to the craft sticks so they don't slip out. You might be able to use toothpicks, but they could break easily, depending on how thick your straw is. Good luck!