Bought for my 5 year old son. Helicopters and the launch system are not light enough for helicopters to actually fly. It takes a lot of strength to pull the brake rope hard enough to make them fly significantly. Definitely too much force is required for a small child. And given that this set doesn't require a lot of Lego pieces (just a plane, which is relatively easy) because of the emphasis on flying helicopters, it's a poor price.
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