Yes, when DCA first opened there was very little for children to do there. Disney quickly became aware of this and created A Bug's Land themed after the film A Bugs Life. There you can find attractions like Heimlich's Chew Chew Train where kids will love the oversize eye-candy and getting sprayed with the scent of watermelon! There Tuck and Roll's bumper cars (slow and gentle), Francis' Ladybug Boogie (a version of the teacup ride) and Flik's Flyers (think Dumbo). There is also the "It's Tough to be a Bug" 3-D movie, which can be a bit too scary for little children. There are also water play attractions, tractors to climb on, agriculture exhibits to interact with and a meet and greet featuring Flik and Princess Ata!
Another great area for children is the Redwood Creek Challenge Trail. Note that several play sections of this area have a 42" height requirement but there are things for the real little tikes to play on also. Nearby is the S.S. Rustworthy which is another interactive water area. If you are careful, you won't get all that wet.
The park also features Disney's Electrical Parade which plays every night during the summer and Friday through Sunday nights the rest of the year. DCA is open until 9 PM during the summer and 6 PM during slower periods.
Another great thing about DCA happens every October, Mickey's Halloween Treat. This is a separate ticketed event that happens on specific nights which means a limited number of people are allowed in. The lines to the rides are super short. Adults and children are able to go trick or treating around the park and there is special entertainment and decorations everywhere. This years dates are October 4, 11, 18, 25, 29, 30, 31 - 6:30-10:30 p.m. and October 5, 12, 19, 26 - 7:30-11:30 p.m.
Tickets are already on sale to the event for annual passholders and Disney Visa cardholders. Advance price is $24 per ticket, regardless of age. Day of the Event the tickets go for $39. Call 714-781-4400 for information and ticket sales. Your children will love this!