We first witnessed the fascination of junk at the Boston Children's Museum, where one rainy day our children played with all sorts of discarded junk for hours on end. If you can't make it to Boston, don't worry. Collect your own junk: cardboard toilet paper reels, pieces of wood, anything shiny, pieces of white foam that are usually used to pack fragile items, jar lids, lollipop sticks and popsicle sticks, in short, all sorts of little things that might end up in your home .
Put all this stuff in a box and one day, when your child and his friends are bored and start pestering you with the question: “What should we do?” - take out this box and say: “Come on, children, make me something unusual and interesting from this.”
If you have older children, save a variety of larger scraps for them: broken chairs, leftover building materials, etc. If workers are making something somewhere near your home, ask them not to throw away things they don’t need - maybe this will be useful for your children.