For a science project, you can make a projector using recycled materials. The steps are: 1. First, hold the lens or magnifying glass against one of the shorter sides of a box, after that, outline.  2. Then cut out the hole for the lens or magnifying glass using a craft knife safely. Try to cut the circle slightly more minor as compared to the outline.  3. Using a spare piece of cardboard, make a triangular stand for the phone by making two lengthwise folds and forming a triangular shape. Hold the stand using tape. 4. Hold the lens/magnifying glass inside the box and align it with the circular opening. If the lens has a flat surface on one side, the outwardly- curved surface must face outwards.  5. Keep the box in front of a plain white wall and turn off the lights. Play a video on the smartphone and hold it inside the box, facing it towards the projector’s lens.  6. Move the smartphone closer to and further away from the lens and check and mark the position which gives out the best image. 7. Align your smartphone stand to the marked position and tape it to the bottom of the box. 8. Please turn on the smartphone, so the image is formed upside down and keep it idle against the stand. 9. Look at the image on a plain wall. You can try moving the box closer to the wall or further away to change the image quality. Hence, in these simple steps, you can make a projector for your science project.