Highly Possible, but most probably difficult. As the game was aimed for older audiences.
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Ten year olds can play moviestarplanet and girlsgogames
They can play Runescape.
That depends if the parents allow the child to play them. So do you allow a 9 year old child play a teen rated game?
Anyone can play any games they want. If 10 year old can play if they will but make sure they know about online safety especially in a game where you socialize.
Play in the RAIN!