I bought this link for my son's 11th birthday. I thought 4 out of 5 stars was pretty good, considering the number of reviews. Unfortunately, I didn't read them carefully enough (most were 더 많이 detailed than I really cared to bother with). The thing works - that's not the issue - but it only works for 5-7 minutes, then has to be recharged for 40 min 또는 more! For most kids, that's not much time. There's certainly not enough time to play/share with a friend (or little brother). Before we realized this, we tried it out in the cul de sac, then decided we needed a wide-open grassy area for "hard...