Wow...That would suck...I've been teaching my 2yr old we don't touch the glass, throw things at the glass, hit the glass etc...
The other day I made a stupid mistake and left the door to my bedroom unlocked, Riley (my 2 yr old) got in there/ I was painting the kitchen some more, and realized it was quiet...too quiet, and fear struck me as I realized the bedroom door was open. Go in there, and hes sitting on the floor with a bag, and 2 goldfish are in it with no water, quickly took it away and put them in water. Realized that the 3rd fish was MIA, asked him where it was, he pointed to the 20gal. Sure enough, the lil **** moved a fish barehanded one tank to another.
2 out of 3 fish made it, I had to put one down due to severe internal damage. I have learned. Also kinda impressed that he did all that barehanded, within a 10minute time span.