From the City of Allen website, I noticed the price and dates were different:

Tuesday, December 5 and Thursday, December 7
Swim with Santa
Cost: $10
Ages: 6 months - 16 years
Location: Don Rodenbaugh Natatorium, 110 E. Rivercrest
Come see Santa take a swim as he prepares for his long night of delivering presents. Before he swim�s, get your picture made while you tell him what you would like for Christmas. Parents swim free with paid child, children 6 years and younger need one adult in the water. To register, call 214-509-4770.

Wednesday, December 13
Thursday, December 13
Friday, December 15
Lunch with Santa
Cost: $8, $2.50 underage siblings. Picture Only-no lunch
Age: 2-5 years
Location: TBD
Come have lunch with Santa as he takes a break from his toy shop and refuels for the day. Children will be provided lunch while they wait to get a picture taken with Santa. Register today because space is limited for a spot on Santa�s guest list!