Not sure how mephit or small elemental(They do not actually come in tiny size), works for a player character though. They do not really have rules for it. You can extrapolate the racial mods since monsters are assumed to have 10 or 11 as the roll aspect of their stats though. The elementals all end up with +0 or worse net racial mods, and don`t seem like horrible choices if you don`t let them take int as a dump stat.<br/><br/>Small Elementals:<br/>Air Elemental: +6 dex, -6 int, 2 elemental hit dice, 1d4 natural slam, +3 natural armor, 100 fly speed, 20 foot land speed, darkvision 60, air mastery, whirlwind, Racial Bonus Feats: Improved Initiative, Weapon finesse.<br/>Description: This creature appears to be an amorphous, shifting cloud surrounded by fast-moving currents of air. Darker bits of twirling vapor form the suggestion of two eyes and a mouth, but this could be a trick of the swirling air.<br/><br/>Earth Elemental: +6 str, -2 dex, +2 con, -6 int, 2 elemental hit dice, 1d6 natural slam, +7 natural armor, 20 foot land speed, darkvision 60, earth mastery, push, earth glide<br/>Description: Like a walking hill, the creature prods nearer on two featureless legs of rock and earth, its clublike arms of jagged stone swinging at its sides, and its featureless head staring blankly in your direction.<br/><br/>Fire Elemental: +2 dex, -6 int, 2 elemental hit dice, 2d4 natural slam, +3 natural armor, 50 foot land speed, darkvision 60, burn, immunity to fire, vulnerability to cold Racial Bonus Feats: Improved Initiative, Weapon finesse.<br/>Description: A mass of ambulatory flame races across the ground, seeming to flicker and spark from a central, humanoid-shaped conflagration. Like a living inferno, the creature`s burning dance of heat and flame bring it ever closer.<br/><br/>Water Elemental: +4 str, +2 con, -6 int, 2 elemental hit dice, 1d6 natural slam, +6 natural armor, 20 foot land speed, 90 foot swim speed, darkvision 60, water mastery, drench, vortex<br/>Description: A vortex of water rolls across the ground, though it never seems to crash or lose its shape. The waves cascade and storm around a central, humanoid-shaped whirlpool, with watery appendages that pound with the force of an ocean storm.<br/><br/>I can do it for the mephits too if you like but they have a lot more stuff. I think the faeries already have rules for players playing them.<br/><br/>Edit: Added the descriptions so you know what they look like since it`s kind of confusing for elementals. In order of least human looking to most it seems to go Air Earth Water Fire. Earth elementals are more apelike than human, but actually are humanoid in shape.