I keep fire bellied toads as a class pet. Lately, we have had a string of escapes. The same toad keeps getting out of the aquarium. Does anyone else have a fire-bellied toad in a glass aquarium W/ a lid that is able to scale the wall, move the lid, and push its way to freedom? Or should I start suspecting that one of the kids is the cause of this problem...

Help is appreciated! Thank you.