Hey Ula guidesWashington State travel guidesHomeGuidesNorth AmericaUnited StatesWashington StateSeattle's waterfront aquarium, Seattle Center and free transit for riders 18 and under.SeattleFamily travelSeattle · With kidsSeattle with kids: things to doSeattle with kids: free transit for 18 and under, Seattle Center, museum child ages and prices, Link from Sea-Tac and 12 months of weather.