Having an event at a public location or sporting club? Why not invest in some coloured wrist bands and make your event easier (or less difficult anyhow). 

Sometimes (at events normally or where your party is in a public location), kids will be kids and come crawling out from different directions towards your incredibly fun looking jumping castle full of squealing children having fun. 

These wrist bands can really assist to let other parents know that “this is” a private party and can often make all the difference so that the children at “your” party are not missing out or maximizing their fun.

Ps - if your party is in your own back yard and children are crawling over your fences to get to the castle, perhaps you will require sometime more substantial than these wrist-bands… 😊