marmalade goodies answered question 4/30/2007 Is There Any Way I Can Let My Gerbil Play Outside So He Can Roll In The Grass And Feel The Breeze In His Fur? He Wants To Have Such Adventures But I Am Afraid He'd Run Away. Try a hamster ball. It's a plastic ball with vents in it for air. When i had rodents, my hamster and gerbils all loved them.