What should I tap to fix Granny Amy's back?

Tap Granny Amy's bent lower foot/leg. She straightens without using any of the tools.

Which tool helps Granny's back?

None of the massage gun, blue mat/roller, or rolling pin is required in the demonstrated solution.

Yes. One tap straightens her posture permanently, and the card asks whether you are a chiropractor.

Brain Test 4 level guide

medium 5 colors

Brain Test 4 Level 115 taps Granny Amy's bent lower foot to straighten her back; the therapy tools are decoys.

If the player asks you to sign in, open the video on YouTube instead.

Ignore the gray massage gun, blue ribbed mat/roller, and brown rolling pin along the bottom.
Tap Granny's bent lower foot/leg at the bottom of her figure.
Wait for Granny to straighten and for the large green check to appear.
Wait for the completion card that asks whether you are a chiropractor now.

Colors in this level:

Blue, Brown, Gray, Green, White

Dragging the blue mat/roller onto Granny; the demonstrated attempt does not solve the level.
Trying the massage gun or rolling pin; both are decoy props in this scene.
Tapping Granny's back, the girl, or the empty background instead of her lower foot/leg.

Board notes 5 details

Layout: A girl stands on the left while Granny Amy bends over on the right with one hand on her lower back; a massage gun, blue ribbed mat/roller, and brown rolling pin sit along the bottom.
Goal: Relieve Granny's back pain and make her stand upright.
Opening: Ignore the three tools and tap Granny's bent lower foot/leg.
Danger Zone: The massage gun, blue mat/roller, and rolling pin are decoys; tapping the back or girl does not trigger the demonstrated success.
Mechanics: The lower-foot touch triggers an immediate posture change: Granny straightens, the green check appears, and the chiropractor card follows.

What should I tap to fix Granny Amy's back?
Tap Granny Amy's bent lower foot/leg. She straightens without using any of the tools.
Which tool helps Granny's back?
None of the massage gun, blue mat/roller, or rolling pin is required in the demonstrated solution.
Does Granny stay upright after the tap?
Yes. One tap straightens her posture permanently, and the card asks whether you are a chiropractor.