Enrich children's leisure lifecultivate hands-on ability and consolidate knowledge. Suitable for physical experimentsscientific experimentssummer campshome school unit study etc. Manufacturered by ZRM&E. Helping students understand physics knowledge by building series and parallel circuitsenhance their learning experience . Package:6-Pack AA Physics learning battery holder tool.Easy to connect . Great teaching tool of physics for studentassisting teachers and parents in better physics teaching.