1,Material package set is made of co-friendly and safe material, non-toxic and harmless 2,Helps to develop manual dexterity, imagination and learn the basics of physics. 3,Develop children's hands-on ability and scientific curiosity, stimulate interest, independent thinking 4,Handmade material kit,which needs assembling by hands, let the children experience the fun of science in play. 5,Boost the relationships between parents and children by playing together Bubble has a kind of godless attraction, a small bubble, crystal clear, colorful, like a time machine to evoke many people's memories of childhood. Handmade material package, hands assembled, let the children experience the fun of science in play. Features: Material package set is made of co-friendly and safe material, non-toxic and harmless Helps to develop manual dexterity, imagination and learn the basics of physics. Develop children's hands-on ability and scientific curiosity, stimulate interest, independent thinking Handmade material kit,which needs assembling by hands, let the children experience the fun of science in play. Boost the relationships between parents and children by playing together Specification: Material: plastic Type: 1, 2(Optional) Age: over 14 year Power supply: AA x 3 (not included) Product size:15.5 x 11.5 x 16cm / 6.1 x 4.5 x 6.3in Weight: 180 -185 g / 6.3- 6.5 oz(approx.) Package list: 1 set x DIY Bubble Machine kit (battery not included) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.