Yes, this could be the reason! If it did, u have to handle it carefully. Don't let him develop to bad feeling on school. Please comfort him more when u back to home and give him more security as possible.
Aiya, spare blankets for standby at home are needed ga, especially when having kid!
If I were you without blanket last night, I had to put on thin fleece coat, thicker casual pant & soc ...
I know there is restriction from 教統局 for the maximum amount on deposit fee ($11xx for full day and $6xx for half day).
So your current scholl is good for charging only $550 wor.