Wooden puzzle 6x3D Educational Wooden Scientific Research Description: Scientific Experiment Toy: This scientific experiment can understand the structure and principle of the projection machine. Stable performance: This technological educational toy is made of wood, stable and reliable. Scientific toy: self-assembly toy for children is interested in learning knowledge, science and physics, developing structural imagination and practicing practical manual skills. Self-made model: DIY design machine Can practice practical skills and other skills. Cultivate curiosity and desire to explore science, very interesting. Great prezent: This science experiment technology toy is designed for children's gifts for birthdays or parties. Size Chart: 10 cm x 4,6 cm x 4 cm / 3,94 inch x 1,81 inch x 1,57 inch The package includes: 1 set of practical science toys (6 pcs. )