Dips or bumps?

3D

Are these lines straight? Look closely!

Which center is larger?

Swirlies.

Stare at the black dot and move your head close to the screen and back.

Stare at the cross and move your head.

Are the purple lines straight or curved?

What numbers can you see?

Can you say the WORDS?

Columns or square posts?

Crazy crank.

Cube

Artsy cube.

Tops or bottoms?

Can you see the dalmation?

Duck or bunny?

How many legs does this elephant have?

Stare at Queen Elizabeth for 1 minute, then look at the blank box.

Can you see three faces?

How many people can you see?

Stare at the flag for one minute, then look in the box below to see a red, white and blue flag.

A goblet or two faces?

Same green on the top and bottom.

Face of a liar.

That's LIFE!

Stare at the lightbulb and it will begin to glow.

One or two shades of pink? Only one.

Straight or curved purple lines?

Straight or curvy?

Is line BC longer than line AB? Measure them!

Which line is longer?

Curving straight lines.

Curving straight lines.

A face or a man playing a sax?

Nutty nut.

Busy squares.

Yikes!

Which rectangle is taller? Measure them!

How many shelves?

The magic eye!

Curly swirly.

Curvy lines....or are they?

Never ending stairs.

Terrace trouble.

Triangular trouble.

Which way?

Busy.

Spiralling out of control.