I had quite a large box from a delivery which I managed to open out. I fully lined this with white paper as well as cutting a window from the bottom of the box and a section out of one side. The window on the bottom I covered with 3 sheets of tracing paper and then flipped the whole thing over for the lamp to diffuse light through.
Now you are at this point all you need is a daylight temperature lamp, I just added this bulb to my angle poise desk lamp. And lastly a good background, whether it be pastel coloured paper or a long sheet of white pinned to the top back panel to make an infinity background.
I have had a pretty stressful few weeks so I decided to buy myself some flowers, though as a photographer rather than just stick them in a vase I pulled out a select few to photograph.
The daylight lamp works perfectly to get the right white balance, and you can move it forwards and backwards to get an even illumination on your subject. It isn't the most elaborate of studios but it works well for a lot of different subjects!!
If you already have a lamp and a box like me this cost less than £10 to make, all i needed was paper and a bulb :). Worth a try and the results you get are great.