california.legoland.com Coupon Code LEGOLAND California Kids Go Free Through October Get Coupon Code 15025 LEGOLAND California Kids Go Free through October. Get a free Child Ticket with paid Adult Ticket to LEGOLAND California and SEALIFE Aquarium. The code is valid now and will expire October 31. The code is 15025. Coupon does not include Brick-or-Treat Party Nights.