My son loves metal construction sets and we have so few of them. So he got the wind turbine Birthday. The trouble began with the assembly, in some parts of the hole and did not fit two things missing from our fundus we improvised. At the meanest was then that after exactly 20 seconds gave the solar cell the spirit we stirred the wind turbine nothing :-( We are really no beginner course and we do not rule out self-blame, but in this kit really are many shortcomings have been .. ,