They will make a 5 year old builder happy. Shapes, magnets and simple design stimulate imagination and free play. While they won't replace Lego, they seem to inspire a very different kind of creativity. Rather than trying to replicate complex designs in single player, we see a lot more storytelling, collaboration, and "big ideas." Spaceships, towers, pyramids and other toys and objects. These were Head Start's favorite toys and we were happy to find a great set at a good price to take home. In addition to free play, we'll work on sorting, shapes and colors, and talk about magnetism, polarity, and simple physics and geometry.