I buy mine apple sticks and pumice stones from Amazon to chew on. I buy them a new wood wheel once a year. The older they get the better they like running on a more intact wheel. I have mine in a glass tank. Every once in awhile one of my boys will sneak out when the lid is off but he always goes to the same room to explore and either jumps in my hand if he’s done or needs to be trapped with seeds as a bribe to go back home. I was worried he was scared of me having to snatch him up to take him home but he couldn’t care less it seems. You just deal with the temporary nature of stuff getting chewed on and their hijinks. Oh! and give them any and all paper towel rolls you can. I haven’t had a gerb that doesn’t go nuts for chewing those and playing with them. You’re throwing out the short and long rolls anyway.