What Toys Can Occupy Them For Longer Time

I bought a big set of jigsaw puzzle for SQ and another small set of jigsaw puzzle for Kiki last month. I thought they would love to play it, but too bad it only able to attracting them at the first few days. They look very happy to play the puzzle when I brought it back for them, keep asking me to play with them. I somewhat feel annoyed about it. Nevertheless, it only happens for few days only. Now, they don't seem like interested in the puzzle anymore. I'm thinking to give it to my nephew to play, perhaps SQ & Kiki will interesting on it again when they seen KorKor play it.