Twin gals have been riding there push bikes for a awhile. With open face/xc type helmets. They are starting to be able to follow me so i know wipeout are coming. Im looking for a full face helmet for the twins.
Just be careful of the weight. Full face helmets are not good for little kids' necks. You really want as light a helmet as you can get. Safety ratings like "DOT" are going to make the helmet a lot safer but a lot heavier. And are more than likely unnecessary for a 2 year old. Keep in mind too that full face helmets will reduce periferal visibility and hearing, so be extra careful if they are riding near streets.