I have found them on amazon.com. They are called Maxim 6 piece Train Car Combo. The Thomas the tank engine wooden trains work on the track as well.
If it helps, the size of a regular matchbox car fits and runs perfectly on the tracks. To be honest, this table came with enough to keep a child busy with what was included and I am the kind of person who is always lookihg to 'buy extra.' With this train table, it is not necessary.
answered 2 months, 2 weeks ago
You can purchase Maxim train engines, cars and accessories from the Maxim distributor that offers all Maxim train sets, track and accessories - www.woodentracks.com
answered 3 months ago
Maxim Customer Service
Walmart, hobbytown, kmart
answered 4 months, 4 weeks ago
I found compatible trains at toys r us
walmart sells them separately and Toys R Us