What do you guys do to entertain yourselves

I am currently on my 5th day of subbing and the days are getting repetitive. I normally end up scrolling reddit on my personal hotspot (normally slow) the whole class to pass time because the school wifi blocks everything. Do any of you use VPNs? I have tried reading but I frequently have to stop reading and scold the children or something so I cant really get a good reading in. I have been subbing strictly middle school. I am thinking of buying a coloring book? But I feel that may make the children distracted somehow? Not sure. Let me know what you do to pass time/entertain yourself during class.

edit: I do not use my phone! this is about my laptop use while the children are not needing my assistance. there are a lot of instances where this happens a lot!