i have a red earred slider who's almost 2…

i have a red earred slider who's almost 2 years old now and has maybe a three inch shell by now. I try my best to give him the best possible home thats available, but I still think I can do more. is it a good idea to let him out of his home and let him walk around the house or maybe outside in the grass, or is too dangerous? you seem like you'd know more than me ;;

Sure, as long as you are watching them of course, those slippery things can run off at any moment! They might get a little scared in too much space though