Issue with the Charcoal Brick

[KlutchxKing518]

My fire slimes can escape... I just bought the new charcoal brick toy for my fire slimes. I watched them play around with it for[code][/code] a while and they started jumping on top of each other to get the toy. One managed to get on top of the brick and then jumped outside of the incinerator. I put the slime back in and got rid of the toy. I thought the charcoal brick would be awesome for the slimes and i wish i could still have it, but I don't want my slimes in danger. I'd enjoy if there could be some sort of higher walls for the incinerator. I can give more info if needed. Thanks.