Someone on these forums recommended this table. I was near an IKEA while traveling and picked one up. I have to say we've definitely gotten $20 worth of use out of it! I's been almost a year and still going pretty strong. The top wipes off fairly easily, you just have to be be conscientious not to leave a spill soaked on it. I sprayed disinfectant and let it sit just a bit too long and there is a minuscule amount of water damage in one corner, but you cannot even tell by looking at it.
It is not the most high quality set in the world, but I am very happy with it. It is very light weight, enough so that my son (14 months) has been able to push around the chairs/table for months and used it for practice when learning to walk. If my kids ruin this set, I would consider buying another. We use it every day, multiple times a day. The wood is unfinished, I figured it it gets marked up with crayon I would just take some sandpaper and buff it out!
http://www.ikea.com/us/en/catalog/products/50178411