Wouldn’t it be great to organize a cleanup day? It’s a big job, so you’re gonna need some trash grabbers.

How can you find the best grabber for the job?

You’ll start by testing these 2 grabbers. You’ll also need a controller.

If you have time, you should build and test your own design.

You’ll need :

• 1 LEGO brick
• 1 empty plastic bottle
• 1 ball of crumpled paper  
• 1 stack of LEGO wheels
• 1 apple (or any round fruit)

Which do you think works best?

Try to use each Grabber to pick up the empty bottle, crumpled paper, and LEGO brick.

Give it a score:

• 1 point if it grabs, lifts, and moves the object
• 0 points if it grabs but drops the object
• -1 point if it doesn’t grab or lift the object

Note your scores in a table.

Repeat the last test using the LEGO wheels, crumpled paper, and an apple 

Note your scores in another table.

• Which Grabber is the best for small objects?
• Which Grabber is the best for heavy objects?

Collect more objects from around your classroom and predict which Grabber will be best at grabbing and lifting each.

Record a video explaining what you’ve been working on.

Make sure to include your whole team, even the camera-shy ones!