The Solar Cell can be used to deliver clean energy to any Magcircuits set.  It can also recharge the Rechargeable Battery Module so that children can explore hands-on principles of renewable clean energy production and management!  When used with the Hand-Crank Generator it can power Magcircuits sets without using inexhaustible kid power! Includes USB-C charging cable. Works best when exposed to sunlight. (Light Modules sold separately.)