Santa's might still be open during Christmas - but the others are not.
I think Clarks is the best of them all. They do a really nice job there, and they have quite an amazing collection of, well, stuff. Old typewriters, mutated animals, fire fighting equipment, electronics, old china, etc. They have amassed quite a museum collection over the years.
I don't know when you were last at Clark's, but they now have Segways. Yes, Segway rides, and they are included with your admission.
You go over by the tilted house (I forget the real name) - Not Merlins Mystical House, the other one, the old one. You get to ride normal Segways on a dirt trail alongside the railroad tracks. You ride for like 3 minutes, and then let somone else take a turn. Yes, they even let small children (like my daughter who was 7 at the time) ride them.
If you want to pay $15 extra (I think its $15) you can take a 45 minute tour on the off road X2's over the covered bridge back in "Wolfman Territory" - Gotta love that wolfman
WOLFMAN WOLFMAN ..... IN HIS CAVE ..... HE NEEDS SOME .... BURMA SHAVE.
-dave