Everyone should take a look at how MIPS helmets work.
There are definitely safer helmets out there, if only for the fact that they are designed for multiple impacts instead of just one like the majority of other helmets. For most helmets on the market you are suppose to replace them after ANY major impact. Due to the haziness of "what constitutes a major impact?" and the pricy-ness of helmets, plenty of kids are running around with helmets that have met their expiration date.
Then you get into the science of falls and find out that traditional helmets aren't designed for oblique falls, even though this is the most common way you fall, and you start to see that there are better helmets out there.
MIPS helmets are expensive unfortunately, so if you can't afford one I'd say your next best bet would be the Giro Combyne softshell helmet. Doesn't have the same oblique fall properties, but at least is designed to take the kind of multiple impacts that park riders routinely see.
