Currently cannot use toys from the default Toy Box window.
Also it now says "Already known" in red text on toys already collected.

9x [ADDON_ACTION_FORBIDDEN] AddOn 'AllTheThings' tried to call the protected function 'UseToy()'.
!BugGrabber\BugGrabber.lua:519: in function <!BugGrabber\BugGrabber.lua:519>
[C]: in function UseToy' ...faceBlizzard_Collections\Blizzard_ToyBox.lua:170: in function ToySpellButton_OnClick'
[string ":OnClick"]:4: in function <[string ":OnClick"]:1>

This was fixed in d9baecc on our git.