Here are Family Travel Forum's tips for an extra fun and safe day at the theme parks:

1.  BUY SEASON TICKETS.
Find out whether a season, resident or family pass to your local theme park is a bargain. It often is, and may include admission to a water park which will keep kids busy all summer.  As competition increases, some parks have begun selling "super" season passes that are valid at all of the companies parks in North America -- a great savings for the family traveler!
 

2.  GET DAY PASSES IN ADVANCE.
Avoid your first line at any theme park by buying park passes before arrival. Call the park's toll-free number to ask where they are sold; AAA offices, travel agents, and local tourist offices often sell single or multi-day passes at a discount. Several theme parks are encouraging web purchases by offering $5-$10 discounts on park passes bought through their own website. In many cases, you can print out your ticket confirmation and just have the bar code scanned to enter through the park's turnstile.
 

3.  AVOID THE CROWDS.
Visit when schools are in session to get the most for your money. At most theme parks, Tuesday through Thursday are the least crowded days. A 2004 survey by the travel site, Travelocity.com, reveals that while 42% of travelers with children visit theme parks in summer, only 22% plan to go between September and November.
 

4.  ENJOY THE NIGHTS.
See if a park has discounted, evening-hour admission, but don't be the last to leave. Traffic to and from the parking lots at closing time is awful.
 

5.  FIGHT THE SUN.
Be sure to wear sunblock and bring your own water bottles to refill at public fountains. If parks provided shade, it might discourage the purchase of over-priced drinks and ice cream.
 

6.  BRING YOUR OWN SNACKS.
If you have young children, load a cooler with beverages, snacks, sandwiches and a water spritzer into your wagon, or rent one at the gates, so you can tote your load and park it as needed.
 

7.  COME PREPARED.
If you're into thrill rides, secure eyeglasses and hats with an elastic strap and bring a waist pouch, to avoid the need for expensive, coin-operated lockers. If you love water rides, wear water shoes and bring a towel and change of clothing, so you can avoid buying unwanted 'souvenirs.'
 

8. REQUEST SPECIAL ATTENTION.
Call ahead to Guest Services if you're traveling with someone with special needs. Most of the parks can accommodate mobility, sight or hearing-impaired visitors, and may provide a complimentary 'first-in-line' pass.
 

9. SAFEGUARD YOUR KIDS.
Worried about losing little ones? Affix a waterproof name tag to each child, show him/her a meeting place, and dress children in the same color to keep track more easily.
 

10. ALLOW TEENS FREEDOM.
Worried about wayward teens? Avoid cellphone bills by renting Motorola two-way radios ($10/D at many parks),   then let them wander freely to try different rides and attractions.

And by the way, many summer-only parks now reopen over holiday periods such as Halloween, Thanksgiving, Christmas-New Years, and Easter. Special live holiday shows (we loved the Christmas Karaoke at Six Flags Over Texas), themed decor, night lighting, holiday foods and toddler activities will keep everyone else busy while teens race off to their favorite coasters.  For three October weekends a year, for example, SeaWorld Orlando's "Halloween Spooktacular" offers special shows with a creepy twist, trick-or-treating, and seasonal arts and crafts.

Check out the website of your favorite theme park for holiday openings, special rates and park pass discounts, and the schedule of performances. 

Some of the major theme parks can be found at:

Busch Gardens, SeaWorld and More:  www.4adventure.com

Cedar Park and Others: www.cedarfair.com

Disney:  www.disneyworld.com or www.disneyland.com

Paramount Parks:  www.paramountparks.com

Six Flags:  www.sixflags.com

Universal:   www.themeparks.universalstudios.com