Balloon emoji, made by Dzuk (dzuk.zone) are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. (creativecommons.org/licenses/by-nc-sa/4.0/)

Thanks to Kay (@ceralor on Twitter) for giving permission to use the air_tank, bike_pump, inflatable_valve and inflatable_valve_open emoji in this pack.