Horse Isle is a fantastic, kid safe game for all ages and is currently looking for new players, its totally free to play!
On the game you can train, buy, sell and capture wild horses, make ranches and compete with your horses!
There is also tones of quests, mini games and other educational things around the game :)
Join Chestnut server and find me 'CountingTheStars' and I will give you a free horse, tack, money and a foal companion for your horse!
HORSE ISLE - Online Multiplayer Horse Game