Scripting helpers is a good site for roblox scripters to ask questions. If you're not familiar with roblox, it is a community which asks and answers questions about LUA programming. Although the mods have strict rules, your child might not understand this untill he/she is 12+.
About this site
Scripting Helpers is a Q&A community focused around the online building game ROBLOX, using the programming language Lua.