Here in the US if your kids go to a public school they don’t wear uniform. Mandatory uniforms are only worn with school kids that are in private schools. But I think you can still let your kids wear some kind of french toast uniforms or any uniforms that are approved by the school. Our kindergartner goes to a public school and I also bought her some school uniforms that she like, which can be worn in the school that she go to.
I noticed that during back-to-school, it is hard to look for clothing that our children can wear that will last long. Children are very active and you have to let them wear clothes that will not be ripped right away when they run, jump and climb around. It can be daunting to find the durable clothing but inexpensive ones. But as a mother, I don’t wanna splurge on school clothes or uniforms. They grow fast and buying them expensive clothing is not practical for me. I wish though that they have uniform at least I won’t have a hard time thinking what they have to wear the next school day.