We didn’t buy it last year and we didn’t get the labs done. This year, we bought it and we will begin labs this week.
I think it is worth it if you don’t want to drive around looking for things you need. Some of the things you have to still gather like purple cabbage, but the course suggesting freezing some for the other 2 labs that require it (which we are doing). The other things not included truly are things you have like a rubberband.
I think I paid $75 for both this kit and the astronomy one. I bought ours at Homesciencetools.com
I don’t know if they are cheapest, but our butterfly larvae (for littles) died twice in transit b/c of the heat and both times homesciencetools customer service was fabulous and sent free replacements. Still no butterfly larvae b/c we are going to wait until it cools off, but they are going to yet again send them to us (3rd time’s the charm we hope).
All of that to say I recommend the above site b/c of their customer service and they sent a very detailed list and it all came nicely packaged and labeled. I don’t know of others, but I’m sure you can find them other places too. HTH