Electronic Circuits Electronics Discovery Kit Building Blocks Assembling Toys for Kids Educational Science Experiment Toys OPTO Optical flow constant: Breakthrough height-fixing

Optical flow constant: Breakthrough height-fixing technology that keeps the drone consistent with the height below it

MATERIAL : PVC

Box Size:620*340*230mm

Color:Multicolor

Electronic Circuits Electronics Discovery Kit Building Blocks Assembling Toys for Kids Educational Science Experiment Toys OPTO Optical flow constant: Breakthrough height-fixingRM358784393383774 If You Like This Item,Please Add It To Your "Wish List",If You Like Our Store,Please Add It To Your "Store List". We Provide Big Order Big Discount ,If You Have Any Question,Please Contact Us Thank you very much!!! ^ ^ Description : Battery: AA battery Begin your snap circuit experience with a wonderful introduction to problem solving, following directions, and the satisfaction of a job well done. Extra safety features for younger