Can a 2-year-old child float? What about the elderly?

It’s possible, but it depends on individual circumstances. The following groups are not suitable for drifting: those with severe cardiovascular disease, mental illness, high blood pressure, or patients with other serious diseases such as severe myopia; pregnant women; children under 1.4 meters tall or seniors above 60 years old should not participate in this activity.
Okay, but depends on individual circumstances. The following groups are not suitable for drifting: those with severe heart disease, mental illness, high blood pressure, or persons suffering from other serious illnesses; pregnant women; children under 1.4 meters tall (or seniors over 60 years old), who should not participate in this activity.