We got a MSB kit for a gift about a year ago. DS5 was excited at first, but it turned out to be pretty basic, and he was very disappointed with the easy-cheesy experiments. There are all things you could do at home, with common household products, and he was expecting more science magic than watching mold grow on a banana (which he'd already seen before!). IMO, not worth the money. Then again, you just aren't going to get a really cool science kit these days anymore; no one wants the liability!