AITREASURE DIY spider robot is so much fun~ It teaches kids to be patient, following instructions, and be skillful~ This DIY robot spider is made of plastic. Parts are displayed in 4 plastic sheet/molding. Just remove each part accordingly from the sheet and assemble the robot spider step by step. One thing for sure is, once assembled, it might be a bit difficult to remove it if it's assembled incorrectly. It's very challenging to assemble the robot spider and once done assembling, feeling accomplishment~ It requires one AA battery to run this robot spider. It's a fun little creature~