How to build a see-saw: Kids love see-saws, so imagine their delight when you make them their very own. And see-saws don’t come any more budget friendly than this little beauty. All you need is a few pieces of plywood, an old tyre and a little paint. The seesaw is light enough to move around so, if one area of your lawn is becoming worn, just relocate it to another spot. This is a wonderful project for using up scrap materials and, of course, repurposing an old tyre.