I am about to build a playground out of popsicle sticks for my pet mice - it wouldn't be something that would stay in their cage - it would be for them to play on when I take them out of the cage. I want to use a hot glue gun because the glue is instant - bonds very well to wood and has no odour. Is it non-toxic though? The package doesn't say either way - it just says it's acid free and a must for crafter tool set. Are hot melt glue sticks generally non-toxic? They have no smell and I remember kids back whe I was a kid that would chew on them - and they didn't get sick.