How do I make the magnet in Brain Test 4 Level 235?

Put the plus symbol on the eraser's red half and the minus symbol on its blue half.

Where is the missing robot leg?

It is hidden among the right-side clutter and appears automatically when the eraser magnet attracts it.

No. They are distractions; only the eraser and the two polarity symbols are required.

Brain Test 4 level guide

medium 7 colors

Brain Test 4 Level 235 puts a plus on the red end and a minus on the blue end of the eraser, turning it into a magnet that finds the robot leg.

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Find the red-and-blue eraser on the floor left of the metal strips.
Drag the black plus symbol from the battery area onto its red end.
Locate the black minus symbol exposed near the right-side battery and robot area.
Drag that minus symbol onto the eraser's blue end.
Wait for blue magnetic waves to radiate from the completed eraser magnet.
The striped yellow robot leg is pulled from the clutter and the green check appears.

Colors in this level:

Yellow, Red, Blue, Gray, Black, White, Turquoise

Trying to assemble a leg from the loose screws, ruler, or metal strips.
Pressing the large red button or opening the toolbox instead of building a magnet.
Placing both polarity symbols on the same eraser half or reversing their colored ends.

Board notes 5 details

Layout: Doctor Worry and his one-legged yellow robot stand above scattered screws, tools, metal strips, batteries, and a red-and-blue eraser.
Goal: Build a magnet from the eraser so the missing metal leg is pulled out of the clutter.
Opening: Take the black plus symbol from the battery area and place it on the eraser's red half.
Danger Zone: The screws, ruler, screwdriver, metal strips, toolbox, and red button are decoys; reversing or omitting the eraser's polarity will not create the magnet.
Mechanics: Adding opposite polarity marks to the eraser's colored ends converts it into a working magnet that attracts the hidden robot leg.

How do I make the magnet in Brain Test 4 Level 235?
Put the plus symbol on the eraser's red half and the minus symbol on its blue half.
Where is the missing robot leg?
It is hidden among the right-side clutter and appears automatically when the eraser magnet attracts it.
Do I need the screwdriver or loose screws?
No. They are distractions; only the eraser and the two polarity symbols are required.