Completing and obtaining approval to travel to Aruba through the Embarkation/Disembarkation card online before arrival is a requirement for entry to Aruba. The Public Health authorities of Aruba also advise you to download Aruba’s Health App on your smart phone prior to your travel. For more information on the Aruba Health App see here.
Children under 15 years are not required to provide a negative COVID-19 test result on entry.
Children under the age of 2 are exempt from presenting a COVID-19 test.
Travelers with proof of recovery from the virus within the last 90 days prior to boarding. Proof of a recent positive viral test and a letter from your healthcare provider or a public health official stating that you were cleared to travel.
More info at the CDC site
Travelers who did not get tested, are advised to stay home and self-quarantine for 10 days after travel.