I am absolutely delighted and surprised by the result of this button machine. Did the same to me which made itself. The machine is easy to use and seems to be tough and resilient. My daughter is almost 7 and initially had some difficulty in turning the wheel, but after 2-3 times then flipped it. What you could possibly have done better are the infecting hurry. After prolonged use, they can fall off sporadically, even when you connect you need some patience.
