I was not impressed with this subscription. I paid for the three month package. It took forever to get the first which was a letter with a black light pen. My daughter was super excited about it and then a couple weeks later we received the spy kit with a mission. I like that the student could come up with their own creation but do wish there was a little more instructions for when they "hit a wall".
This was also all we received, which was not worth the price in my opinion. I'm not sure if I was supposed to receive another for our 2nd or 3rd delivery but was about to be charged again so cancelled another 3 months. I'd recommend checking out another STEM box if that's what you are looking for.