Mine was a selection kit.The cost of tool kits is way too high compared to the amount of coins that are available. In the Archaeology event it was much easier to get tools.
Without enough tools many boards get locked up with a checker board at the bottom and not enough turns left to clear that up.
I'm also seeing a some boards with only one paw and no others dropping into play.
The last one is on me, I started my event building before I opened the surprise box thinking that it held a selection kit but it has a level one building and I will be lucky to get one building fully upgraded now.