I had 3 of these toads, came home with 2 more this evening. One, when purchased, was a darker green than my other two greens, now I can't tell much difference between the three. The other is a chubby brown one who appears to like to get into tight places.
The new brown one:
He/she was between a rock and the tank wall the last time I checked on them, maybe the space of about 1/2 inch width. I did put a couple of hiding places in for them.
There will be some gravel put in that "hole" by tomorrow morning, if not earlier.