I love this product, it was bought for my Sons' 2nd birthday. He is fascinated by the movement of the marbles. However it certainly needs an older person on hand to put it together, it's not particularly difficult to do so, but my one small complaint is you have to be gentle putting the pieces together as we've had a couple of occasions where being a bit heavy handed meant the whole thing slipped and fell apart. The great thing with this is it will last for years and years, and eventually my Son will be able to put it together himself. There are little novelty bits on it - a wheel shape that spins round when the ball goes past which he loves, lots of bends and curves - brilliant fun - although do just be careful with the marbles, my Son thought they were sweets and did try eating them!