My 'hands down' recommendation for either 2yos or 3yos is the PlasmaCar. BEST 'ride it' toy EVER (and at age 9, still in almost daily use). Indoors, outdoors... the thing is phenom. Supports adult weight, but isn't as agile at that weight. If it's primarilly to be an indoor toy OR IF YOU HAVE TILE AT ALL... get a bike shop to put rollerblade wheels on instead of stock wheels. Makes it soooooo much quieter! We started requiring helmets at age 3 after a year of use when the neighborhood kids discovered hills.
Agile. Sturdy. STABLE. (we've had fewer than 5 spills in 6 years with over 40 kids using them daily from ages 2-9... and those were kids *trying* to spill them. As opposed to the skateboards, trikes, bikes, etc., where there's almost one spill a day)
http://www.amazon.com/gp/search/ref=sr_so_1?rh=n%3A165793...