I am buying a train table and some wooden trains for my lo who is 20 months.. he loves Thomas from the show and we have a few ... So which wooden ones are the top ones? and is there a list of the trains? I go Toys R us and there are sooo many trains taht I am so confused. I dont want to buy duplicates and he doesnt need the all right now... Is there a place to get them less expensive? I am current;ly looking at Amazon. TIA!!