Amazon has the Playskool Poppin' Park Roll-N-Pop Express Train for $6.39 +
FSSS. Next cheapest is target for $14.99.
My 1yo son got this for Christmas and really likes it. Only thing I don't
like about it it that it doesn't move on it's own.
Link: http://www.amazon.com/Playskool-Poppin-Park-Roll-N-Pop-Express/