Walmart offers the Batman Batmobile 6-volt Battery-Powered Ride-On for $79 with free shipping. That's $20 under our mention from two weeks ago and the lowest price we've seen. (It's the best deal now by $16.) It features forward, reverse, and a top speed of 2.5 mph.
Vinegar is arguably the most versatile product in your house. If you aren't using it for all of these purposes, you're probably wasting money.