Easy to assembleMost suitable for school projectsCan work on both battries and solar powerContains: 1 motor with spring and pinion gear, 1 round shaft, 1 gear with shaft, 1 red wire 9 centimeter, 1 black wire 9 centimeter , 1 hybrid solar panel, 2 button cells, 1 red wire 23 centimeter , 1 black wire 23 centimeter, 2 tray of different plastic parts..