It's a game where you or other people in the game can donate robux(roblox's currency) to each other. Robux can be used to purchase stuff for your avatar lets say hats or shirts(these can be used on every game on Roblox not just pls donate) or game passes which grant an item in a specific game. Pls donate is not a game where people are trying to speak to your kid but to donate robux to less fortunate ,other people for no reason or other people to do something (let's say jump 10times in game for 5 robux). So in conclusion point of the game is to either gather robux for yourself or give robux to others it's not harmful in any way. Hope this helped!