It’s only 9 a.m. and your kids are already bored. With these four great puzzles, you can do keep your family entertained without feeling a bit guilty. Occupy kids for hours with these hands-on lessons in engineering, geometry, logic, physics, and problem-solving. You might even want to join in the fun.

Put young minds in gear. Amazon

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The act of building this hand-cranked 3D puzzle requires popping out the pieces from laser-cut wooden sheets and carefully assembling them. It’s a great way to understand how simple machines function, and to witness the laws of mechanics in action. Teens ages 14 and up can spend hours transforming the 233 components into a living sculpture that’s about 10 inches in height and looks great on a bookshelf or desk.

So many ways to get it wrong. Amazon

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Kids aged 8 and up—as well as adults—can grow their visual-spatial skills while working their way through the sixty puzzles in this portable game. Your challenge is to match the image on each card by configuring fourteen plastic geometric shapes (six red and eight yellow) inside the puzzle’s frame. The game is inspired by Chinese tangram puzzles, and is harder than it appears.

More entertaining than playing with your napkin at the dinner table. Amazon

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This unique game evokes both the Japanese art of folding paper and a Rubik’s cube, and comes with 100 puzzles to solve. You’ll need to cleverly fold each included piece of origami-like paper to keep white squares on one side and black on the other. The puzzles start off relatively simply, but progress in difficulty and are recommended for ages 10 and up. Kids may find themselves inspired to start learning origami classics like cranes and flowers, and will move onto other brain teasers with renewed confidence.

This atom is split without fission. Amazon

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If doing jigsaw puzzles as a family has always been on your rainy day to-do-list, consider giving your dining room table over to this 1,000-piece science-themed puzzle for a few hours. When completed, its size is 26.5 by 19.25 inches, and includes far more than just a rendering of an atom. You’ll also piece together the periodic table, construct the names and photos of five atomic scientists, and render infographics on fusion, fission, and more. When it’s done, glue it together and frame it for a cool addition to your aspiring scientist’s bedroom wall.