I bought this online, either on Rakuten or Yahoo! Shopping. I tried using it twice, but when my child was 2 years old, they were a bit too rough with it, making it difficult to operate... so I ended up not using it. The balls fall out if you don't go slowly. Putting the balls back in after sorting them is a bit of a hassle. Even when turned upside down, about half of them remain, so it would be nice if putting them back was also part of the fun. The panel is transparent, but it's more like it's slightly cloudy, which is a bit of a mystery. (There's no film on it.) Would this be good for a child? I plan to put it in a bag and mail it via post. #tsuttsubaby