Can one object remove all the children in Level 43?

No. Match a different room prop to each child.

How does the last child leave?

Open the door after the other distractions have been used.

Brain Puzzle: Tricky Quest level guide

hard

Use the space picture, curtain, rubber duck, cat, and door as separate distractions to clear every noisy child from the living room.

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

Drag the astronaut out of the framed moon picture onto the boy drawing rockets on the rear wall; he grows into the man wiping the wall.
Pull the red curtain down from the left window and drag it onto the boy standing on the sofa's left cushion; he leaves the sofa.
Drag the yellow rubber duck from the left window ledge onto the small boy standing at the front-left corner of the coffee table; he follows the duck away.
Drag the white cat onto the center of the coffee table in front of the boy beside it; that boy follows the cat away.
Tap the brown door on the right, then drag the final boy at the lower-right edge through the open doorway.

Board notes 5 details

Layout: A woman sits on a pink sofa amid several children, with a space picture, red curtain, duck, cat, coffee table, and door nearby.
Goal: Remove every child from the room.
Opening: Drag the astronaut out of the moon picture and onto the boy drawing rockets on the rear wall; he grows into the man cleaning that wall.
Danger Zone: Each child responds to a different environmental prop.
Mechanics: Successful prop interactions remove the children one by one.

Can one object remove all the children in Level 43?
No. Match a different room prop to each child.
How does the last child leave?
Open the door after the other distractions have been used.