Who knew what possibilities here are to use wastepaper! Here’s one: make a weaved basket.
One of my finished baskets. Read below for instructions.
Start with an even number (times 2, so 12 is okay, but 10 is not) of strips. Fold them lengthwise, as many times as you like (I did it twice). Mark the middle of each strip and weave them in a square, see 1st and 2nd picture. Then you start to weave the middle strips together, creating a corner. Do this for all sides. Continue weaving the strips together until you reach your desired height or until the strips end ;). Finish by folding the strips back or use glue.
Tip: first I used pins to keep the strips together, but a small dot of glue works better.