Thermometer built into clothes for baby

My first baby related idea. You’re baby can’t tell you it’s too cold or too hot, it just cries. You have to work it out as a process of elimination. However if the clothes they were wearing had a thermometer on the inside and the readout on the outside then parents could tell at a glance whether the baby is warm. Might save you the rigmarole of feeding it when it doesn’t need to be fed, changing it when it doesn’t need to be changed etc.