I saw this image on Pinterest and just love it!
Little airplanes made from shampoo bottles! Looks like they've just cut a slit on the sides to slip the wings in, and used bottle caps for jet engines. I'm guessing the stripes are colored tape. I can't read the original blog as it's not in English, but totally check it out. They have a cool idea for what looks like little plaster ladybugs and other fun kid projects!