Favorite social puzzle

The simplest toys are the best. Our favorite family social puzzle is a tangram, an old classic from China made of 7 geometric pieces that you arrange to fulfill a required silhouette. With two sets you can race to finish. It is much harder than it looks, yet doable and fun for small folk. You can make a tangram from cardboard, or 3D print one yourself, but the version we grab is Tangoes, a tidy travel case with two sets of pieces, plus cards (with solutions) for all the target images. We own 3 or 4 Tangoes ($12), enough for larger groups. — KK