Inventions! From upper left, moving clockwise,

 

Shootie, Felix L.

It cleans up paper from the floor and puts

It away.

 

Paint, Jack

It cleans up paint of the floor.

 

The Wheel Spinner, Alice

It rolls and it spins the wheels.

 

The Cutter, also known as the B Saw, Felix G.

It cuts things up like a saw.