M.K.
Hi! We ended-up reconditioning an old (smaller) kitchen table by cutting the legs down to the right size (so the kids could stand and play). But we've been very surprised...the kids would rather assemble the tracks together on the carpet than on the table. I think the table "restricts" them, and my kids aren't old enough to be able to plan a track design that is strictly on the table. Without the confines of a table top, my daughter helps my son build creative configurations that have stretched into the kitchen, etc! On the occasions we've pulled out the table, my husband or I must design and assemble the track. And that takes away so much of the fun and creativity.
BTW, we have a berber type carpet and we have the Thomas track system. There has been no problem using the tracks on the carpet -- it works great!
Enjoy the hours of fun you'll have together with the train system -- it's worth every penny (no matter which system or table you go with!!)