There are various ponies from the Dora the Explorer line of toys. They are made by Mattel and may be marked Mattel and/or Viacom (the company behind Dora). At least some of these were impacted by Mattel’s lead paint recall (I’m living dangerously!)
Click images to enlarge.
(above: different eye colors)
Fairytale Adventure horse
This is bigger than the preceding ponies, about 7.5″ tall:
Stock photo: 
2.25″ unicorn:
