dOvOb Marble Run Construction Building Blocks STEM Toys - Railway Set - Marble Games for 3~10 Years Old Boys & Girls Kids As Gifts CREATIVE LEARNING TOY : This Marble Maze can improve children's operational ability, colorful and beautiful appearance.It can develop children's cognitive development of color, cultivate kids creativity. It also can exercise the baby's structural space imagination. INTERACTIVE GAME : This Marble Maze is an interactive game. Fit for kids above 4 years old and bring the fun to whole family.Push the button together and see whose marble run down to the bottom fastest.It is a very good Parent-child games and Children's educationl toys. It not only can allow children to feel the warmth of the family but also can increase the feelings among them. CREATE UNLIMITED COMBINATIONS : Child can assemble this Marble Run Set into different models by thinking, which can improve the child's creative thinking ability. Through repeated assembly of the marble run,a child can gain basic knowledge and improve on subjects such as physics,and engineering as well as further development in the fields of problem-solving,motor skills,hand-eye coordination,and spatial awareness skills. GREAT GIFT : This Marble Run Set will be a great gifts for 3,4,5,6,7,8 Years Old kids as a birthday preasent or Christmas gift.And it also a great parent-child game for its operability and Infinite possibility. ATTENTION : The size of this marble set is smaller than the normal one, which had been shown both in the picture and the description. It contains some small balls(about 11mm), need to be accompanied by an adult to use, should teach the child the correct use. So as to avoid eating and other unnecessary damage, please pay attention and give understanding. If you have any question about the product, please free to contact us. Assemble the marble run into the model according your imagnation.Then put the marble on the top of swirling funnel,and press the valve handle, and the glass marble will start to run down from the top of the models, just begin to enjoy the fun of racing. You can watch the marbles race together running through the pieces.,which bring much fun to playing.When the glass marble scroll pass the surdboard,the board will evert. When the glass marble scroll pass the mini spin wheel and hit the wheel,it will spin like wind,which bring a lot of fun to playing. When the glass marble pass the serpentine track the glass marble will rolling on the track smoothly. The pieces are translucent that allow you to see the marbles run down from top to bottom in the building set, which bring much fun to playing. This Marble Run comes with 75 pieces and 30 glass marbles.This marble run set is made of odorless plastic material which is non-toxic, without BPA , no harmful substances. To build tracks that twist and turn with colorful pieces simply slide,Then send marbles speeding through chutes,merry-go-rounds, windmills, S-curves, a U-turn slide and centrifugal funnel.