No. All travelers, except children under the age of 12 (for quarantine exemption travelers) or 18 (for sandbox travelers), are Thailand pass required. If you have children under the age of 12 or 18, they will not need to register for the Thailand Pass.
Did your 3 old needed a pcr ? Which hotel? Just 90 min from arrival to the hotel 👍🏼. In my case around 2:15h from BKK to my Hotel (lunch break of the driver included 😅)