When looking through the 265 "Nursery" images at Acclaim Images.com this A Toy Train was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
A Toy Train
Close up of a toy train with blue background.

Some related terms for more images:
still life,  train,  plastic toy,  amusement,  nursery,  activity,  childhood,  object,  chugging,  preschool,  railcar,  carriage,  transportation,  railway,  play,  plaything,  fun,  locomotive,  toy train,  coach,  st yiap,  steam engine,  movement,  game,  motion,