Painting inexpensive tables

Hey all,

Hoping to get some advice from those who know what they are doing. Trying to help my son put together some things for a first studio apartment. Recently, he/we got hold of a couple of inexpensive tables ($10 each) that we thought could be refreshed and be great starter tables. One is lime green and the other is white but shows a little wear.

The green one appears to be finished in a gloss paint. The white one is the following Ikea coffee table http://www.ikea.com/us/en/catalog/products/00095036
Yes, I know we only saved $10, but a change of color is nice regardless.

So, I am looking for advice on how to go about painting each of the two tables. Please note that I am looking for the easiest way to do this. These are not investment pieces and will probably be replaced in a year. It would just be nice if they looked better in the interim.

Thanks for any help you can give.