No — AICM's own service index, which lists the Aerotrén, information modules, passenger support, inspection points and emergencies, includes no children's play area at either terminal, and its passenger guide names none either. The only kids' areas documented for MEX at all sit inside card-access paid lounges — a sala familiar inside the Salón Beyond Banamex and an área infantil inside the HSBC Premier Lounge — and even those are recorded only by a third-party Spanish directory, not by AICM itself, so treat them as unconfirmed rather than guaranteed. If a play area matters for your trip, plan around bringing your own activities, since there is nothing built into either terminal's public or post-security areas for children to use.