Here’s the completed passage with one suitable word in each blank:

During the early years, (1) **doing** jigsaw puzzles is a popular activity that many parents choose for their children to develop their concentration and creativity. With various colours, shapes and sizes, this hobby significantly draws kids’ attention, which they can spend all day handling the small pieces (2) **without** boredom. It’s also quite challenging for little kids to use their eyes and hands for finding and (3) **putting** many pieces together to make the given image. To motivate kids more effectively, parents should choose suitable and captivating jigsaw images. They can let kids do simple ones first and then (4) **increase** the levels of difficulty gradually. But remember that this indoor game can make a child get frustrated and even give it up. That’s why parents should be ready to give children support in time and cheer them up (5) **until** they reach the last jigsaw.