Thanks for replying, Arnie! Not sure what you mean need certificates, unless it's for the bones? I am 100% collected on the leaves and stuff, and 60% on the bugs. The only one I can't start yet is the bones. Lol. I hope they incorporate some of the VVs collections, I loved sending the kids for things. Anywho, back to guesswork. I hope LDW changes the age ranges and what they can/cannot do: example, my 2 year old "heating up dinner" ... not exactly realistic. But, I am having fun, and that is what counts!