Free Multiplayer Games: Walk Around, Play with Others, Do Quests

You're describing MMORPGs. Free-to-play options by age group:

Younger Kids

• Roblox: Massive user-created library; walk, explore, quest, socialize. Content varies widely by age.
• Minecraft: Not an MMORPG but robust multiplayer—build, explore, quest with friends. Open-ended creativity.
• Animal Jam: Kid-focused, animal world, activities, quests, social.

Older Kids / Teens

• MapleStory: 2D anime MMORPG, quests, dungeons, events.
• Dofus: 2D, unique art, deep tactical combat, exploration, social.
• Tree of Savior: Beautiful 2D, co-op focus, vast world, challenging combat.

Safety Notes

• Teach online safety: never share personal info.
• Monitor in-app purchases (cosmetics/advantages)—use parental controls.