Is there anything close to GTA but in a kid version?

Yes, games like "LEGO City Undercover" and "Go Vacation" offer open-world experiences similar to GTA but are designed for a younger audience. "Lego City Undercover" features a humorous storyline and allows players to explore a vibrant Lego city, solving crimes and completing missions. "Go Vacation" provides a more relaxed environment with various mini-games and activities, set on a tropical resort. Both games capture the essence of exploration and adventure without the mature themes of GTA.