Whilst Looking For Nothing In Particular,

I came across these,

 making this is a only a mornings work if you are handy with woodworking tools,

which will leave you the afternoon free to make this box,

 that is the question,

 have a look at this one, do the circles move? but how can they it is a still picture!

move your head close to the screen, do the perfect blue squares appear to be distorted? absolutely but they are not, the illusion is due to the black lines in the back moving and twisting it in your mind,

finally how many shelves do you see in this eye trick picture? look to the right and you'll see three shelves, look to the left and you'll see four shelves!