We have achievements for colors, so why not achievements for experiment species? They're pretty unique, since they're only available in common and scribble, so they're not like "other" pet species. I imagine, if there was achievements, this might spur some people into using the pet v2 zapper that they might not otherwise use - since the zapper now has a "zap only experiments" option, if people use that (which they probably would; people are using it a lot already), it could maybe make the achievements itself a pretty good sP sink (without even having to add in another sP sink option).

Maybe if they get all of the achievements, they could unlock a form title called "Mad Scientist", or something similar to that? I imagine there could be a nifty little item at the end, too. Although, I imagine the achievements/title would be enough for a lot of people.

The only thing I'm not sure about is when new experiments are added, but I guess it would just get harder over time to complete for people who haven't done it, I guess?