The basketball hoop is a fun and interactive model. Once made, just crumple some paper into a ball and start shooting (you can also make a crumpled ball). It can be made from either origami paper or printer paper. If you make it from origami paper, it won't be as tall, and won't stand up as easily, but it will still work. I would recommend making it from printer paper though. Also, it might fall over when being used, so just put a book or something behind it and it will stay up fine.
Step 1: If you're using printer paper, orient it vertically. If you're using origami paper, make a waterbomb base and then skip to step 9.
Step 2: Valley fold the top left corner over (the top edge should align with the right side)
Step 3: Unfold
Step 4: Valley fold the top right corner over to the left edge
Step 5: Unfold and turn the paper over
Step 6: After you've turned the paper over, fold the top edge down so the creases lie on top of each other.
The coin purse is a very easy and practical model to fold. Once folded it will hold quite a bit of coins, and you can always make more. You could even have a different color coin purse for each type of coin!
Step 1: Start with your paper color side down
Step 2: Valley fold the bottom edge up to the top
Step 3: Valley fold the right edge to the left so it is five centimeters in length. This divides the paper about into thirds. If you don't have a ruler, you can just roll the paper into thirds. This is not as precise, but still works.
Step 4: Valley fold the left edge so it aligns with the right edge
Step 5: Unfold and your paper is now neatly divided into thirds
Step 6: Take the far right side and squash fold it flat
Step 7: Now squash fold the left side down
Step 8: Once it matches the picture below turn the model over
The Baggi box is a really cool model that was designed by Giuseppi Baggi. It is a very sturdy and practical box, but it has one super neat feature. It can be folded from a sheet of origami paper or an A4 piece of paper (8.5 by 11 inches). When you fold it from an A4 piece of paper, you get different sizes of boxes depending on how you orient the paper to begin with. This is a good model to make out of patterned cardstock paper. It makes your box even sturdier and makes it look pretty cool.
Step 1: Start with your paper color-side down. If you are using A4 paper, orienting it vertically will give you a cube shaped box, while orienting it horizontally will give you a skinny box (pictures of each of these boxes are at the bottom of the page)
Step 2: Valley fold the top up to the bottom, crease, and unfold
Step 3: Valley fold the top and bottom edges to the center, crease, and unfold
Step 4: Valley fold the bottom corners in so their edges align with the lowest crease line